Error C2 Heater Bosch

What is the fault of C2 Bosch error affecting your heater?

Water heaters from the Bosch and/or Junkers brands are high-quality and energy-efficient devices that provide hot water service to households. However, like any electronic device, they may experience some faults or errors that can affect their operation. One of these errors is the C2 error code, which appears on the digital panel of the heater when there is a problem with the pressure switch.

The pressure switch is a device that measures the air pressure in the combustion gas exhaust circuit. When the pressure switch detects abnormal pressure, either excess or deficiency, it sends a signal to the heater to shut down and display the C2 error code. This is a safety measure to prevent the risk of carbon monoxide poisoning or equipment damage.

What can cause the pressure switch to open during the heater's operation and trigger the C2 error code? Some possible causes include:

• An obstruction in the combustion gas exhaust: This cause may be due to dirt, dust, insects, leaves, bird nests, or other objects that hinder the normal flow of air.
• An incorrect installation of the exhaust pipe: A pipe that may be incorrectly sized, poorly sealed, improperly oriented, or have too many bends or elbows.
• A lack of proper ventilation in the location where the heater is installed: This cause can lead to a recirculation of combustion gases and a decrease in air pressure.
• A failure in the pressure switch itself: The pressure switch may be damaged, misaligned, or disconnected.

How to fix the C2 error on Bosch heater?

What can be done to resolve error code C2 and restore normal operation to your Bosch heater? Some possible solutions you can try are:

1. Restart the heater to refresh the sensors: This is done by turning off the heater, disconnecting it from the power supply, and waiting a few minutes before reconnecting and turning it back on. Sometimes, occasional errors like these can be resolved simply by restarting the heater.
2. Check the combustion gas outlet of your heater: This should be done to verify if this outlet is blocked and to ensure proper gas evacuation in the heater. This is done by visually inspecting the evacuation tube and removing any objects or dirt that may obstruct it. A brush or vacuum can also be used to clean it from the inside. Typically, this gas outlet tends to get clogged with dust, cobwebs, dirt, insects, and bird twigs that may have attempted to nest, etc.
3. Check the installation of the evacuation tube: Ensure it complies with the manufacturer's technical specifications. This is done by checking that the diameter, length, slope, and the number of bends or elbows in the tube are suitable for the model and power of the heater. Also, ensure that the tube is properly sealed and oriented towards the outside.
4. Inspect the ventilation of the area where the heater is installed: Check if there is sufficient air intake and exhaust. This is done by ensuring that there are grilles or openings in the walls or windows that allow air renewal. Also, avoid placing objects or furniture near the heater that may obstruct the air circulation.
5. Check the pressure switch's condition to verify if it is functioning correctly: This is done using a pressure gauge to measure the air pressure in the exhaust circuit and comparing it with the values indicated by the manufacturer. Also, ensure that the pressure switch is properly connected and adjusted to the heater.
6. Repeat all the above steps and make sure to follow everything to the letter if the problem persists: If you haven't been able to fix the issue, try applying all the steps we've described again. It wouldn't hurt to do a second check of everything we've indicated, but this time, make sure to follow everything to the letter and don't overlook anything.
7. Request a check of your heater with Bosch technical support: If none of the above solutions has worked to fix error code C2, then it would be most convenient to leave the problem in the hands of experts. Give Bosch technical support a call to arrange a home visit. We are confident that you are in very good hands; they will help you find a solution to this issue with all available guarantees.

In summary and to conclude our brief advice guide, error code C2 in Bosch heaters indicates that there is a problem with the pressure switch. This component of our heater is responsible for controlling the air pressure in the combustion gas evacuation circuit. The possible causes are a blockage in the gas outlet, incorrect installation of the evacuation tube, lack of proper ventilation, or a failure in the pressure switch itself.

To find a solution to this problem, here are the steps you would need to follow, summarized for you:

• Restart the heater to refresh the sensors
• Check the combustion gas outlet of your heater
• Check the installation of the evacuation tube
• Check the ventilation of the area where the heater is installed
• Check the pressure switch's condition to verify if it functions correctly
• Repeat all the above steps and make sure to follow everything to the letter if the problem persists
• Request a check of your heater with Bosch technical support

That's all for today! We hope our advice guide has been helpful in resolving error code C2 in your Bosch heater. Preventive maintenance can help avoid such situations. Until next time!