How to light a Bosch gas heater – why it does not light up or goes out

Nothing keeps your house warm and comfortable during the winter months like the warmth provided by a dependable gas heater. For many years, Bosch gas heaters have been a reliable option because they provide effective heating solutions. But occasionally, you might have trouble starting your Bosch gas heater or notice that it keeps shutting off without warning. You need to know why this occurs and how to solve the issue if you want your heater to work properly when you need it most.

It’s imperative that you first become familiar with the correct process for lighting a Bosch gas heater. Even though these heaters are meant to be easy to use, sometimes a small error or missed step during the ignition process can keep the heater from lighting up properly. Usually, you have to make sure the gas supply is on, light the pilot light according to the manufacturer’s instructions, and then light the main burner. Depending on the model of your Bosch heater, this procedure may differ slightly, so it’s always a good idea to consult the user manual.

A pilot light problem is one common reason why a Bosch gas heater might not light up. When the heater is turned on, the pilot light acts as a tiny flame that ignites the gas. The main burner may not ignite correctly if the pilot light goes out or does not stay lit. Pilot light issues can be caused by a number of things, such as an unclean or clogged pilot assembly, a malfunctioning thermocouple, or inadequate gas flow. To fix pilot light problems, check and clean the pilot assembly, make sure the gas pressure is correct, and replace a malfunctioning thermocouple.

A problem with the gas supply is another possible reason why a Bosch gas heater won’t light or keeps going out. The flow of gas to the heater can be disrupted by low gas pressure, a closed gas valve, or a blockage in the gas line. This can prevent the heater from lighting or cause it to extinguish quickly after. It is crucial to confirm that there are no obstructions or leaks in the gas line, and that the gas valve supplying the heater is fully open. It is advisable to get in touch with a qualified technician to inspect and resolve any gas supply issues you may have.

A Bosch gas heater may occasionally malfunction due to problems with the ignition system or individual parts like the control module or ignition electrode. The control module controls the ignition sequence and makes sure everything works properly, while the ignition electrode is in charge of producing the spark needed to ignite the gas. The heater may not ignite at all or may have trouble lighting if one of these parts is broken. To fix the heater and get it working again, replace any broken ignition parts or get expert help for diagnosis and repair.

Preparatory work before turning on the Bosch flow water heater

It is necessary to remove air from the water heater tubes prior to the first switch-on. To do this, turn on the hot water tap and wait for a stable water flow, which can be determined by listening for any unnecessary noises when the hot water tap is open.

Crucial! By taking this precaution, it is possible to keep the water heater’s metal components from overheating in areas where it is not desired, specifically where the tubes are connected. Additionally, it might be required to bleed off extra air in the gas tubes; the procedure varies depending on the type of water heater.

Typically, this can be accomplished by turning on the gas or by taking the screw out of the gas regulating tube. The instructions for a specific heater will, of course, be found in the manual. Additionally, if the water heater is installed after repairs, air must be removed from the pipes. To do this, either open a free valve or use the water heater itself.

As advised in most flow water heater instructions, make sure there is a draft before turning on. If there isn’t, this could be the cause of the Bosch gas heater not lighting up. To check for draft, simply light a match against the control panel window and observe how the flame behaves. If the flame is deflected in the direction of the panel, there is likely enough air draft, which means the appliance will operate steadily.

The device requires a lot of air to operate fully because the water heater’s burner uses a lot of oxygen, which is taken from the room where it is installed. To ensure a normal air supply, the door to the room containing the water heater should not be tightly closed, and there should always be fresh air coming from the atmosphere in the apartment or house. If not, there is a significant risk of being poisoned by the products of the water heater’s burner.

Crucial! It is not advised to run a fan or air conditioner while the flow heater is operating because this will interfere with the collector’s natural process of removing gas oxidation products. Additionally, since there is a chance of getting burned, it is advised against going near the window when the burner is running.

We’ll go into great detail about lighting a Bosch gas heater in this article, with an emphasis on common problems like sudden extinguishing or failure to ignite. We’ll break down the main variables at work so you can better understand the process, whether you’re troubleshooting an existing issue or just trying to grasp it. We’ll walk you through the necessary procedures to guarantee your Bosch gas heater runs dependably and safely, from inspecting ventilation and safety mechanisms to testing gas supply and ignition components. This guide intends to demystify the process and provide you the tools you need to efficiently keep your home warm, regardless of your level of experience with gas heating systems.

Rules for turning on the Bosch gas heater

Safety precautions must be followed when operating gas heaters; these are outlined in the heater’s instructions. It is crucial to keep in mind that the column runs on natural gas. As such, you must confirm the construction’s dependability and the tightness of the gas and water hose connections before turning on the water heater. Prior to operation, it is imperative to inspect all of the heat exchanger’s hoses for factory defects, such as leaks or dents.

Verify that the burner and heat exchanger’s structural integrity is intact. Additionally, confirm that every protection sensor is fully connected, as the column cannot function without them. Additionally, confirm that every fastener is in its designated location. In addition to making the heater’s operation as safe as possible, this should be done because there is a chance of a factory defect.

Use caution when working with electrically ignited water heaters and the supplied battery cells:

• It is very important not to throw away batteries with a small charge, which can be considered used, together with household waste. Batteries must be disposed of at special collection points.
• For stable operation of the appliance, use only new batteries, which must be of good quality.
• It is not allowed to change the type of batteries provided by the manufacturer, it is also necessary for stable operation of the device.

How to turn on a Bosch gas heater with different types of ignition from the company

The truth is that there are three distinct ignition methods used in the columns. You can use the handbook to find out the type of ignition of a specific column. The manual will list the column name; you can find the type by looking up the indices at the end of the column name:

• P: indicates that the heater has a piezo ignition.
• Index B: indicates that the flow heater belongs to the class of water heaters with electric ignition.
• Index G: columns with this letter at the end of the name refer to the type of ignition with a hydroturbine, in which the ignition is automatically activated by the water pressure.

Crucial! There are subtle differences between each of these types when using them.

Piezoelectric ignition

The Bosch company uses this kind of flow water heater switching on in a number of models, including the WR 10-2P, WR 13-2P, WR 15-2P, and W 10-2P column. These models share similar ignition patterns most of the time. This ignition system is semi-automatic.

Remove the speaker’s metal protective cover before turning it on for the first time and performing additional debugging. Following this process, make sure the ignition flame is set to the proper length and that there is enough air space between the nozzle and the igniter tube for the flame to burn.

To ignite the appliance, move the slider on the control panel to the ignition position, usually in the center position. Then it is necessary to check the gas supply. Press the button on the slider of the control panel, at the same time press the piezoelectric ignition button, which is located just below the slider and the control panel itself, as a rule, one press of the piezoelectric ignition button is enough to ignite the ignition flame, but still make sure that the igniter is working, otherwise repeat pressing the button until the ignition flame turns on. Then release the button on the control panel slider, the flame should not go out, of course.

The next step is to set the maximum temperature. To do this, turn the temperature regulator to the maximum position, move the slider to the right, or the maximum power position, and open the hot water tap. At this point, the flow heater should start operating. Next, the gas pressure needs to be checked. If it is higher than it should be, the combustion products’ temperature will be higher than usual, which could lead to unstable operation. In the event that changes need to be made.

Electric ignition

Models having the index B at the end of the name are fitted with this type of ignition.

Crucial! By consulting the handbook, you can determine the type of ignition for a specific model. Bosch flow water heaters models W 10 KB, WR 15-2 B, WR 10-2 B, and WR 13-2B all use this kind of ignition.

First, put two type R20, capacity 1 batteries into the battery compartment.5V batteries, which are typically included with the water heater, should be installed with positive contacts on both sides facing the latch on the battery compartment cover. These models also have a battery charge sensor on the flow water heater; when the battery is low, the control panel’s LED will glow red; when the charge is sufficient, it will glow green. If there is not enough charge, the batteries need to be changed.

Verify that the gas used to operate the appliance matches the gas needed for operation before turning on the flow water heater. Naturally, open both the cold water and gas valves.

Press the switch-off button on the control panel to turn the device on. The appliance is currently in standby mode; to activate it, simply turn on the hot water. Next, use regulators to help you adjust the water’s temperature as needed. Poor gas pressure settings are probably the cause of the unit’s erratic operation and frequent shut-offs, but qualified technicians should do this type of troubleshooting.

Hydro turbine

WRD 13-2 G, WRD 10-2 G, and WRD 15-2 G models have it installed.

Crucial! Similar to electric ignition, hydro turbine ignition of the Bosch column is quite simple. It operates on the principle of water pressure and doesn’t require any additional tools to be installed; in most cases, it operates automatically. It ought to exit automatically as well.

Common causes of unstable operation of Bosch speakers

Should the Bosch gas column fail to ignite, you may attempt to troubleshoot the issue on your own. It is very easy to determine why the column is unstable.

Does not light up

The cause might be low water pressure; to address this, clean all filters, check the main line’s pressure, and install an additional pump if needed.

Ignition flame goes out

The safety sensors must be inspected, and if needed, they must be replaced or connected.

Goes out when mixing

In the event that it needs to be cleaned, the mixer filter may be clogged. Additionally, the hot water pressure can be easily decreased by the cold water flow; to achieve this, the hot water temperature on the column must be adjusted appropriately.

Burns out during operation

It might be the result of inadequate draught; address the issue of oxygen getting to the burner and seal the burner manifold.

Possible other causes

The incorrect gas pressure setting is the primary cause of the Bosch column’s inability to ignite. The burner will burn steadily after it is adjusted for this purpose.

How to clean the ignition wick of the column

The heater won’t function correctly if the igniter is clogged; to clean it, it must be disassembled, and the nozzle must then be cleaned with a fine steel wire.

A malfunctioning wick could be the cause of a Bosch stove not lighting.

To keep your house warm and comfortable during the winter, make sure your Bosch gas heater lights up on time. Effective troubleshooting is crucial when dealing with problems like sudden extinguishing or failure to ignite.

First, make sure your heater’s gas supply is working. Make sure there is enough fuel for the ignition system by fully opening the gas valve. Check the gas line for any leaks or obstructions that might prevent the gas from flowing.

Next, look over your Bosch heater’s ignition system. Usually, an electronic ignition mechanism or pilot light is used in this system. Make sure the pilot light is lit and burning steadily if you’re using one. To guarantee a proper ignition, clear any dirt or debris surrounding the pilot light. In the case of electronic ignition models, look for any broken or loose parts that could interfere with ignition.

Another essential component for your gas heater’s dependable operation is proper ventilation. Make sure there is adequate ventilation in the vicinity of the heater to avoid the accumulation of gas fumes, which could be dangerous. It is also possible for the heater to malfunction or abruptly shut off due to blocked vents or flues.

It is advisable to seek the advice of a qualified technician if your Bosch gas heater still won’t turn on or keeps going out after trying these troubleshooting techniques. To guarantee optimum performance and safety, they can carry out a comprehensive inspection of your heater, find any underlying problems, and make the required repairs or adjustments.

Your home can be kept warm and cozy during the winter months by taking care of common problems with your Bosch gas heater, such as the gas supply, ignition system, ventilation, and calling for professional help when necessary.

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