Circulation pump repair with your own hands

Comfort and energy efficiency during the winter months depend on keeping your house warm and comfortable. In order to keep your home at a comfortable temperature throughout, central heating systems are essential. On the other hand, if your circulation pump malfunctions, it can stop the heating process altogether and leave you without heat. We’ll walk you through the process of fixing your circulation pump yourself with this guide, saving you money and time on expert assistance.

It’s important to comprehend the function of the circulation pump in your heating system before beginning any repairs. In essence, the circulation pump is in charge of transferring hot water from your furnace or boiler to your home’s radiators or underfloor heating system. Your house will not be evenly heated in parts while remaining warm in others if your pump isn’t working properly. Recognizing and fixing circulation pump problems early on will help shield your heating system from additional harm and guarantee even heating throughout your house.

Lack of adequate circulation is one of the most frequent issues with circulation pumps. This problem can be caused by a number of things, including airlocks, blockages, or pump failure. There could be odd noises coming from the circulation pump, uneven heating in different rooms, or even a total breakdown of your heating system as indicators that something is wrong with it. Although you can always hire a professional technician, there are numerous circulation pump problems that can be fixed with simple self-troubleshooting and repair methods.

While it doesn’t take sophisticated technical knowledge to repair your circulation pump, it does require close attention to detail and a fundamental understanding of how your heating system operates. It’s imperative to cut off your heating system’s power supply before beginning any repairs in order to prevent mishaps or injuries. In addition, some basic tools like pliers, a screwdriver, and possibly a wrench, depending on the kind of pump you have, will be necessary. Warmth and comfort can be restored to your home quickly and easily with the correct tools and methodical approach to diagnosing and fixing common circulation pump issues.

Problem Solution
Circulation pump not working Check power supply, clean pump, check for airlocks, replace worn-out parts if necessary

How to carry out regular maintenance of pumps?

It is essential to periodically conduct an external inspection and assess the condition of your circulation pumping device, ideally once a month at the latest.

Pump unit type

  1. Turn the pump on and check for noise and excessive vibration during operation.
  2. Check the heating medium head delivered by the pump. It must correspond to the values stated in the technical data sheet.
  3. Make sure that the electric motor of the device is not overheated.
  4. Check for grease on threaded flanges and, if necessary, restore it.
  5. Make sure there is a ground connection between the pump unit casing and the appropriate terminal.
  6. Inspect the pump from all sides and make sure there are no leaks. Usually such vulnerable places are the junction of the pipeline and the casing of the pumping device. Check the level of tightening of bolts and normal condition of gaskets.
  7. Inspect the terminal box. All wires must be securely fastened. Moisture must not be present in the unit.

Common pump faults – how to fix them yourself?

As shown, pumps from various manufacturers share the same design. As a result, their malfunctions are frequently identical. Many users experience the problem where the rotor does not rotate during startup, but the circulation device hums. Such an issue arises because:

  • Incorrect connection of electrical wiring or lack of power at the terminals of the pump. The problem can be solved by checking the power supply with a tester and reconnecting the pump (correctly)!) cables.
  • Oxidation of the motor shaft. This phenomenon is most often observed when the pump has not been used for a long time (several years). Repair with your own hands in this situation will be as follows – disconnect the power supply, drain the water from the pipeline and the pump itself, disassemble the electric motor (remove the cover and rotor). Now the main thing. It is necessary to take a screwdriver and turn the rotor until it stops in the working notch. The operation can also be performed by hand if the mechanism rotates without difficulty.
  • Foreign objects getting into the mechanism. You need to disassemble the cover and rotor. Remove foreign body. After that, be sure to replace the strainer. As a rule, a foreign object puts it out of operation.

Part of the heating system that circulates

The most likely reason for the pump’s stopping after it starts normally is that the terminals were connected incorrectly. Verify. Make the appropriate connection if needed. The formation of limescale between the mechanism’s rotating units is another factor contributing to the breakdown that has been described. The unit must be disassembled, the existing lime scale must be removed, and all component joints must be lubricated. A loose fuse can occasionally cause the pump to stop. The clamps holding this element need to be taken out and cleaned.

A blown fuse is frequently the reason why the pump equipment does not operate.

Examine the terminals and use a multimeter to measure the voltage there. Replace the fuse if it has blown. These kinds of circumstances are frequently brought on by power grid surges. Connect a stabilizer to the equipment instead of continually changing the fuses. It will consistently guard against voltage variations in the system.

When the pump first starts up, it might sound very loud. This suggests that air has gotten into the circulation system’s closed circuit. By putting in particular clamps for the unit in the pipeline, this can be avoided. A component this small removes the chance of air locks forming in the system. The pipeline will need to be purged if a special unit hasn’t been installed. Excessive noise and noticeable vibration can occasionally also be attributed to bearing wear on the wheel that houses the impeller. You take apart the unit housing, examine the bearing’s condition, and replace it with a new one if required.

Fixing the circulation pump

The impeller’s incorrect (backward) rotation is the cause when the pump fails to supply the necessary head of coolant. This issue only arises when a 380-volt power supply system is connected to the pumping apparatus. Linking the wire to the appropriate phase is the answer. Additionally, when the coolant’s viscosity rises, the head falls. Under such circumstances, the wheel faces strong resistance and is unable to perform its intended functions. The strainer on the pump needs to be taken out, cleaned, or replaced.

It is quite possible to fix the circulation pump by hand, as you can see. Naturally, if we are discussing typical malfunctions. In all other situations, it is preferable to leave the repair of the pump’s functionality to the experts at service centers.

Possible failures and how to fix them

What malfunctions might happen and how can you fix the circulation pump by yourself? Let’s investigate this further.

The pump hums, and the impeller does not rotate

  1. Foreign object in the impeller chamber.
  2. Prolonged downtime of the unit has led to oxidation of the rotor shaft.
  3. The power supply to the device terminals is disturbed.

In the first scenario, disassembling the impeller housing and carefully removing the device will allow troubleshooting to be completed. Remove any foreign objects present and manually rotate the shaft. On the branch pipe, a filter needs to be installed in order to prevent repeated foreign body intrusion.

Along with shaft oxidation, extended downtime can also cause the pump to hum. All oxidized areas must be thoroughly cleaned, and the working unit’s moving parts must be lubricated.

The circulation pump will also hum in the event of a power outage. First, use a tester to check the voltage. The cable needs to be changed if it is damaged or defective. Verify the terminal voltage if the cable is in good condition. A short circuit is indicated by the tester’s infinity icon. Winding breakage occurs at lower voltages. The terminals need to be changed in both situations.

Pump does not work at all

When there is no voltage in the mains, the pump does not function. Make sure the device is correctly connected to the power source and that the voltage is checked with a tester.

Pump shaft for circulation

Power surges have the potential to blow the pump’s fuse if one exists. Replace the fuse if this occurs. Installing a dependable stabilizer is preferable.

Pump starts but stops after a couple of minutes

Possible causes include:

  1. Scale between moving parts of the unit.
  2. Incorrect pump connection around the terminals.

In the event that there is limescale present, the pump may both start and stop instantly. Lubricate the joints between the rotor and stator and remove any lime scale.

In the second scenario, make sure the unit’s fuse is tight. All of the terminals are cleaned and it is removed. Every wire in the terminal box needs to be connected correctly.

Pump is noisy when switched on

A noisy pump could be a sign that there is air in the system. In order to automatically release the air from the pipes, a unit must be installed in the upper portion of the circuit and the air must be bled out.

The impeller bearing may also be worn out, which would explain a noisy pump. It is necessary to disassemble the unit housing and replace the bearing as needed.

Pump vibrates and makes noise

Insufficient head in the closed circuit is the reason for vibration and noise when the pump is turned on. Adding water to the pipes or raising the pressure at the pump inlet connection are two ways to fix this.

Weak pressure

If the pump is not pumping much coolant or has low head, make sure the impeller in the unit’s casing is rotating in the right direction. If you are using a three-phase network and the impeller is not spinning correctly, you have connected the pump to the terminals incorrectly by phase.

The high viscosity of the coolant could be the cause of the reduced head. The impeller encounters heightened resistance and performs subparly, operating below maximum efficiency. It is necessary to inspect and clean the strainer. It is advisable to examine the orifice pipes’ cross-section as well. After that, the pump has to be adjusted to the proper operating parameters.

The equipment does not turn on

If there is a problem with the power supply, the pump does not operate. Examine the fuses and phases. It indicates that the drive winding is burned out if they are in order. In this situation, you will need to seek professional assistance.

The pump’s internal surfaces shouldn’t be rusted.

An indicator, or tester for the circulation pump’s shaft rotation, can be used to diagnose the apparatus. It enables you to check the pump’s functionality without having to connect it to the power source.

Pump will not start

If the device does not buzz and does not work after being turned on, the power supply is most likely the problem. The video of the circulation pump repair shows you how to get rid of these problems. It should be acknowledged that there are various reasons, though.

Repairs don’t always require disassembling the pump. Check the voltage at the connection points on the unit with a multimeter. It might not exist at all or be insufficient.

It’s possible that the pump’s connection to the power grid was improper. It needs to be disconnected in this case and reconnected correctly in accordance with the manufacturer’s instructions.

The gadget’s electronics contain a fuse. It might have burned out if there were power grid malfunctions. The device must be disassembled in order to change the fuse with a comparable one.

The circulation pump is constantly switched off

If the unit shuts off on its own all the time, there’s probably a blockage. Lime deposits progressively build up in the nipples inside the device where the coolant flows. This causes the pump to become jammed and disconnect on its own.

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To fix a breakdown, the unit needs to be dismantled, disassembled, and cleaned. Every part needs to be cleaned thoroughly. To remove any encrusted deposits, use a solvent.

Regular cleaning of the pump is necessary to prevent overloading and subsequent failure of the electric drive.

Why is the heating circulating pump noisy and how to fix it?

The great majority of private residences have separate heating systems installed. Since most private residences are not connected to centralized heating systems, this is the easiest and most sensible solution. Furthermore, individual systems can be configured in a multitude of ways, and heating can be turned on precisely when required.

The circulation pump is a crucial component of a home heating system because it ensures the coolant is transported efficiently throughout the heating circuit. The pump may occasionally become noisy while operating; this is a factor that should always receive the utmost attention because excessive noise is a surefire sign that something is wrong with the apparatus. This article will discuss the causes of the heating system’s noisy circulation pump as well as possible solutions.

Rules of operation of circulation pumps

A circulation pump’s lifespan is limited if the following guidelines are followed:

  • The pump can only be started when the system is filled with coolant;
  • The pump must not be operated when there is no supply;
  • The volume of pumped liquid must correspond to the range that the pump is able to handle, otherwise the equipment will wear out too quickly (you can find out the required value in the technical documentation for the pump);
  • To prevent the pump from oxidizing during the warm season, the heating system should be run for 20 minutes at least once a month;
  • The temperature of the pumped liquid should not be higher than 65 degrees – exceeding this level will lead to precipitation of solid salts.

The market is divided into two categories of pumps: "dry" and "wet." Whether or not the device’s rotor makes direct contact with the pumped medium determines classification. For dry pumps, high noise levels are typical. The main reason these devices aren’t found in private homes is because they have fans, which make a lot of noise when they’re operating.

Of course, occasionally developers install a pump with a dry rotor in a private residence by mistake—sometimes on purpose, sometimes not. These developers typically highlight the equipment’s high efficiency as its primary selling point. When it comes to the main drawback, which is the heating pump’s excessive noise, they would rather remain silent. In such a situation, soundproofing the space or replacing the pump with a better model are the only ways to address the noise issue.

Wet pumps have a rotor that is continuously submerged in the pumped medium, which helps to cool the equipment’s internal components. These devices don’t produce any noise when they’re operating because they don’t have fans, so residential homes can safely install them.

The different noises the pumping apparatus begins to make can be used as a first indicator of potential issues. If the heating circulating pump is noisy, you should identify the exact cause of the issue and try to fix it.

Causes of noise in the pump

There are various causes for the noise produced by the heating system’s pump, but these are the most common ones.

  • Unstable voltage in the power grid. Quite a common problem, because of which the noise of the pump in the boiler – voltage fluctuations. Due to fluctuations, the mode of operation of the pump is disrupted, and it begins to pump the coolant unevenly. It is the heat transfer fluid that will make noise as it passes through the pipes and heating devices. To accurately identify such a problem, it is necessary to carry out a complete test of the heating system and the pump, and special equipment is required.
  • Installation errors. If a peculiar rustling noise is heard from the side of the device, it is necessary to check whether it is installed correctly. In most cases, pumps are installed together with a hydrocompensator, which monitors static pressure during operation of the device. Hydrocompensator (or diaphragm tank) prevents the occurrence of loads that cause the heating pump to wear out and hum.
  • Air jams. At the very beginning of the heating season, when the system is just starting to work, a characteristic whistling noise can be heard from the side of the system. Such a sound effect indicates that air has entered the heating system circuit, which is the cause of the whistle. Mayevsky valves are traditionally used to eliminate air plugs, usually installed in the uppermost parts of the circuit. Such taps should be used before each start-up of the system to ensure that there is no air in it.

  • Wrong choice of pump. Another popular cause of noise is associated with errors that were made when selecting pumping equipment. Incorrectly selected heating pump knocks at every start of the system, so it is best to choose such a variant, the characteristics of which are suitable for a particular situation. In addition, the mismatch of power required always leads to increased wear of the working elements of the device – and then the pump will be noisy for the next in this list of reasons.
  • Equipment malfunction. If a noticeable noise is constantly coming from the pump, there is a very good chance that the rotor or impeller is damaged. An indirect sign of such failures is a decrease in the efficiency of the heating system. Since the described problems are quite serious, to eliminate the problem will require a full repair of the equipment or its replacement. Sometimes the pump may hum due to wear of certain elements and increased clearance between them – in this case it is necessary to replace the adjusting washers to eliminate the noise. Also, the cause of noise can be damage to the wiring, and in this case you will have to go to specialists – it is very difficult to eliminate such a problem on your own without the appropriate experience. Read also: "Why warms the heating circulating pump and what can be done".

Understanding the cause of the noisy heating water pump enables you to identify and eliminate the particular issue, restoring the heating system’s capacity to operate as intended.

How to disassemble a heating circulation pump with your own hands

The circulation pump must be carefully disassembled and dismantled in order to be repaired.

The gadget should be turned off from the electrical network at first. It is required to take out the housing from the device’s power supply unit in order to disconnect the cable from the terminal box. After that, the water supply must be turned off using side valves, and any leftover water in the system must be drained. Next, a hexagon screwdriver should be used to unscrew the pump.

When the bolts are stuck to the pump, an issue could arise. Try to unscrew them again after 20 to 30 minutes after moistening them with WD-40.

It is necessary to take off the unit’s cover following disassembly. There is a rotor with a wheel and blades underneath it. The rotor, which is typically fastened with bolts, must be removed. You will have unrestricted access to the pump’s internal components in this way. After that, the unit needs to be carefully inspected, and any issues found should be fixed.

Concluding all of the foregoing, it is imperative to emphasize that the circulation pump is a crucial component of the heating system, carrying out vital tasks. It is crucial to regulate its operation and perform routine maintenance because of this. If there are any issues, you must act quickly to fix the problem; if not, you can start the unit but it will eventually fail.

Repair kit replacement

What’s included in replacing the circulator repair kit?

  • disassembly of the pump part of the device
  • replacement of components;
  • checking the operation of the motor;
  • assembly of the device;
  • diagnostics of the equipment operation.

A ready-made repair kit for pumping equipment is provided by certain manufacturers. For instance, a repair kit for the circulation pump u4814c, which has a 5200 l/h capacity, a voltage range of 12 to 24 V, and branch pipe diameter of 38 mm. Investing in such a kit will cut down on time and money lost.

Plan for Air Removal

You should only attempt your own hand-operated circulation device repair after the warranty has expired or if calling a repair specialist is not feasible. The reason why certain pump assemblies are difficult to locate for free is due to the manufacturing companies’ trade policies.

How to clean the parts

Lime deposits that build up are the cause of pump clogging. The heating unit may completely break down as a result of excessive contamination. With regular vinegar essence, small deposits on the shaft can be independently removed.

Dilute the pump 1:1 with water to remove any impurities from its interior. Fill the pump with the resultant solution by pouring it through one of the fixing connections.

The lime deposits will partially dissolve after a day, so disassemble the appliance and give it a thorough cleaning to get rid of any leftovers.

Using a wooden spatula, carefully clean the pump internals, making sure all surfaces are free of any remaining deposits. Sanding is the last step in the treatment; this can be done with a cloth or a specific paste.

How to lubricate the pump

For the equipment to function properly, it must be tight. When the pump is not in use, parts that are susceptible to drying out can be avoided by applying a preservative lubricant to the gaskets and inlet and outlet connections.

Prevention and diagnosis of breakdowns

The following easy preventive actions can help extend the life of thermal equipment:

  • Never operate the pump without water.
  • To prevent oxidation of parts during inactivity, turn on the equipment once a month for 15-20 minutes.
  • Regularly conduct visual inspection, be attentive to the appeared noises, excessive heating of devices, leaks.

The equipment is given a technical inspection prior to the commencement of a new heating season. Run a test and determine the state of the most crucial nodes:

  • correctness of connection to the pipeline;
  • tightness of connecting elements;
  • filter condition.

In the world of home maintenance, tackling issues like a faulty circulation pump can feel daunting. But fear not, because with a bit of know-how and the right guidance, you can handle the repair yourself. Whether it"s noticing strange noises or a lack of warmth in your home, a malfunctioning circulation pump can disrupt your heating system"s efficiency. In this article, we"ll break down the steps to repair your circulation pump, empowering you to take matters into your own hands and restore comfort and warmth to your home without the need for costly professional help. From diagnosing the problem to safely disassembling and troubleshooting, we"ll guide you through the process, ensuring that your heating system runs smoothly once again. So roll up your sleeves and get ready to become your own home heating hero!


Warranty coupons are given out at the time the unit is installed. These kinds of records ought to be preserved. If there are any malfunctions during the allotted time, the repair will be done at no cost to you.

Picture 1: 3-speed ZP25 circulation pump with a 3.7 m maximum head and a "Volks" manufacturer.

Characteristic failures of pumps of different brands

Popular domestic and international brands’ equipment has unique breakdowns. Despite their durability and dependability, Grundfos devices require regular end seal replacement. Water will seep in and harm the winding if this isn’t done in time.

Doing maintenance on the unit at home is not recommended. Because of the unique design, repairs must be completed by a qualified technician—ideally, one who works for a reputable service center.

A noticeable buzzing sound and reduced head suggest that the pump’s impeller is worn out or axially displaced. The appliance needs to be taken apart, cleaned of sand, have any damaged parts replaced, and have new seals put in.

Liquid leaks from the electric motor of Jileks units are common. It can be swapped out, but only with something similar in makeup.

Some artisans feel that purchasing an expensive material is not necessary. For this, transformer oil or glycerin can be used. But this is not a wise piece of advice. After an operation of this kind, the technique can completely fail because it very poorly tolerates the filling with alternative means.

It is best to leave this work to skilled professionals and avoid attempting to fix the device yourself. They promise to fill the engine with the original mixture and to follow the manufacturer’s instructions to the letter. It will function just as it did on the day of purchase following maintenance.

Lower oil levels in the pump motor are a sign of worn oil seals. It is preferable to get new ones as soon as you can. By doing this, the motor won’t overheat.

Coils frequently malfunction in the Russian company Livgidromash’s "Malysh" devices. causes this "dry" trouble operation. A loud noise produced when the pump is turned on but no water is being pumped is an indication that the central axis, to which the diaphragms with the anchor are attached, has broken. Once the unit has been disassembled, it is simple to identify this failure.

Even at home, changing the axle is not difficult. However, actually finding the part for sale is a problem.

"Aquarius" pumps have the tendency to overheat. This drawback is particularly noticeable when the machinery is used in shallow-depth wells. Repairs can be costly, sometimes costing up to 50% of the original price. In these situations, a lot of consumers would rather purchase a new appliance from a different manufacturer.

"Rucheek" models are characterized by the same issue. They do not have a very good endurance for continuous operation, even with their modern design and conformance to European standards.

The devices can pump water continuously for a maximum of seven hours, according to the manufacturer. But this kind of load almost invariably results in overheating. It is preferable to take pauses and give the equipment a rest every two to three hours to prevent issues. The pump’s service life will be extended in this way.

The shut-off valve cannot be closed while using a water pump. Future pumping equipment failures will result from this. It is necessary to open the gate valve before turning on.

The "Vodomet" pumping apparatus is regarded as having a stable and dependable operation. The majority of malfunctions here are caused by misuse. Additionally, silt and sand quickly clog equipment that comes into contact with contaminated water. In this instance, the unit’s pump component needs to be changed.

It is worthwhile to seek assistance from the qualified service center’s professional masters if the issue that has arisen cannot be resolved at home. They’ll identify the issue with the equipment fast and fix it so that it functions properly. Alternatively suggest replacing the old pump with a new one if it cannot be fixed or is not financially feasible.

How to diagnose a breakdown

The cause of the breakdown must be identified in order to eliminate it. The stages of diagnostics are as follows in sequence:

  1. Remove the distribution panel with your own hands.
  2. Disconnect the impeller from the engine.
  3. Check how it spins if there is no load. If from now on you want the motor to work smoothly and quietly, fix a smoothing capacitor to the part.
  4. When the impeller is put aside, determine whether the motor is in working condition, whether it is not burned out.
  5. If the shaft does not rotate, most likely a part has broken, which provoked the motor jamming. Then small and vice versa large parts of soil fall into the machine together with water.
  6. It is likely that the stator winding has burned out, due to dirt accumulation and not getting rid of it in time.

Keep an eye out: if the shaft rotates correctly, the motor’s lower part is collected.

Revision of the motor part

A single-phase, mostly collectorless asynchronous motor powers deep well pumps. The wiring diagram shows the presence of a starting capacitor. The electric motor’s stator is attached to the body in a monolithic manner and is frequently filled with epoxy compound.

When removing the impellers from pumps with monolithic construction, press down on the outlet pipe connection outlet to force the motor out of the cup. When the two halves of a rod pump are undone, the motor part is disconnected; with a screw pump, this happens after the working screw is removed. Under all circumstances, the sealed plug must be removed in order to access the motor’s interior (condenser, connection terminals). A sturdy locking ring and two to three screws on the sleeve’s side surface hold it in place. A specific puller might be needed to remove the plug in some types of pumps.

Motor stator for well pump

Oil is used in all borehole pump motors for lubricating, cooling, and dielectric purposes. The oil used is special food grade, but it’s readily available. Darkening or the presence of mechanical impurities, an oil’s cloudy color when mixed with water, and an inadequate amount of can all be indicators of low quality. If the oil is normal, drain it into a dry, clean container and leave the motor housing alone for ten to fifteen minutes to allow all of the residue to run off the walls. When the engine is not filled with enough oil, the gland seals are worn out.

Engine malfunctions can also be caused by worn bearings, which can be identified by backlash and free running noise, in addition to spoiled oil. The pump’s shaft may become twisted and the winding insulation may overheat if it is run in harsh conditions for an extended period of time. Although they are fairly simple to replace, burned-out stator repair is nearly impossible.

Water getting into the motor and burning the stator winding

Pumping mechanism revision

Long dry running is the primary cause of pumping mechanism breakdown, aside from contamination. The only way to repair centrifugal impeller blocks that sinter from extreme heat is to replace them because of the lack of liquid. The auger and seating bushings work in the same way. The shaft may also rotate in the seating holes in the event of jammed impellers, and in powerful pumps, it may even deform or break.

Depending on the level of use, seating bushings and screws in screw pumps need to be changed every three to five years. The primary causes are exposure to tiny abrasive particles and the aging process of the elements.

Screw and bushing for a screw pump

We will call your attention to the fact that borehole pump parts fit together with a high degree of accuracy, making it simple to assemble and disassemble the cleaned mechanism. The elements’ installation order is broken if, during the assembly process, they do not fit into their designated places freely. Although different pump models have slightly different designs, user manuals usually include assembly diagrams along with basic instructions for self-repair and disassembly for inspection.

How to keep the engine for a long time

Numerous additional flaws in the depth pump may make it harder for the user to fix them on their own at home. After that, the repair is completed in a workshop. It is feasible to avoid constant repair work by performing preventive maintenance.

Experts advise clearing the pump of any dirt with your hands; if not, accumulations within will make it harder for it to operate and cause it to heat up more. Repairing such experiments won’t help; they run the risk of igniting engines.

The most frequent malfunctions, their causes and ways of elimination

There are times when the heating circulating pump breaks down. A large number of the malfunctions are self-destructible. Numerous traits that are specific to faults can be used to identify them.

Circulation pump hums, but the impeller does not rotate

People frequently inquire as to why the heating circulation pump buzzes and what to do in such a circumstance. Oxidation of the drive motor shaft is frequently the cause of the pump’s noise and the impeller’s total immobility.

Because the hydraulic machine hasn’t been working for a while, this circumstance may arise. You must carry out the following steps in order to fix the pump by yourself:

  • initially you must disconnect the electrical supply;
  • Then it is necessary to drain all the liquid from the pump and the adjacent piping;
  • after that it is necessary to unscrew the screws and dismantle the drive motor together with the rotor;
  • and the last thing you have to do is to move the pump from the dead point, for this purpose you have to press your hand or a screwdriver into the working notch of the rotor.

Components of the pump for circulation

If something foreign gets inside the structure and stops the wheel from rotating, the pump will still make noise but won’t work. Here, you must inspect the heating circulating pump, locate an additional part, and attempt circulation pump repair:

  • the electrical supply is initially disconnected;
  • then you need to drain the water from the pump and the pipeline,
  • after that it is necessary to disassemble the circulation pump as shown in the diagram in the figure;
  • then you need to remove the foreign object;
  • and at the final stage – a strainer is installed on the inlet pipe.

The circulation pump is heating up

It is crucial that the device’s temperature mode and the heat transfer medium pipes’ temperature mode match. If it has risen, it indicates that either the installation was done incorrectly or there were issues. The following are possible causes for the unit’s warming up:

  1. The installation was done incorrectly. It is easy to identify the problem: if the pump warms up immediately after installation, the cause is clearly there.
  2. Clogging of the system. During prolonged operation, various deposits accumulate in the pipes and rust forms, which impedes the passage of liquid. Consequently, the pump is overloaded in order to ensure normal circulation of the coolant. This causes engine overheating, but unscheduled maintenance can solve the problem.
  3. Foreign object. When there is too much slag in the lines from pipes and radiators, pieces of rust or plaque begin to flake off. Their entry into the device jams the electric motor. If you do not disassemble and clean the device in time, there is a high probability that the motor coil will break down and you will face the problem that the circulation pump for heating will not turn on at all.
  4. Bearings are not lubricated enough. When there is not enough lubricant, the bearings very quickly begin to wear out, which negatively affects the service life of the device as a whole.
  5. Low voltage in the network. If the voltage is below 220 V, the motor overheats very quickly, which leads to failure.
  1. Turn the pump upside down and gently clamp the casing in a vise. Remove the filter screen, then the protective casing under which the impeller is installed. In different models it is attached to bolts, clips, or screwed in with threads.
  2. Unscrew the fixing nut holding the impeller on the stem. These nuts have a left-hand thread, so they are unscrewed by turning them clockwise. Remove the impeller and, if it is worn out, replace it with a new one.
  3. When the impeller is intact, disassembly should be continued until the cause of the malfunction is identified. Unscrew the connecting bolts on the body, as a result of which it is divided into two components, connected to each other by a loop of different-colored wires. If it is necessary to disconnect them, it is necessary to photograph their location beforehand.
  4. To separate the motor from the housing, you should lightly tap the rod with a hammer, because it is pressed into the housing very tightly. After removing the motor from the casing, the electrical part of the pumping equipment is diagnosed.

It’s critical to take immediate action to fix a broken circulation pump in your home heating system in order to maintain a warm and cozy living space. Although it’s always possible to hire an expert, many repairs can be completed by homeowners themselves.

Accurately identifying the problem is essential before beginning the repair process. Is the pump not effectively circulating water, not turning on, or making strange noises? Knowing the symptoms will help you identify the core cause and direct your troubleshooting efforts.

After determining the issue, take your time replacing the entire pump. Simple fixes are frequently sufficient to fix problems with circulation pumps. Look for leaks, clogs, or electrical issues prior to deciding on a complete replacement. Future problems can also be avoided with routine maintenance, which includes lubricating moving parts and clearing debris from the pump.

Don’t be scared, though, if the pump does need to be changed. The correct equipment and advice can make replacing a circulation pump a do-it-yourself task that is doable. For information specific to your pump model, make sure you refer to the manufacturer’s instructions and take safety precautions when handling electrical components.

Always put safety first when working on your home’s heating system. Never be afraid to ask for professional assistance if you’re not sure you can handle the repair yourself or if it seems like the problem is beyond your area of expertise. In order to maintain comfort and energy efficiency, it is imperative that circulation pumps are serviced and maintained in good working order. This is because your home’s insulation and heating systems depend on them.

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Sergey Ivanov

I like to help people create comfort and comfort in their homes. I share my experience and knowledge in articles so that you can make the right choice of a heating and insulation system for your home.

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