As a homeowner, experiencing issues with your Vaillant boiler can be frustrating. In this comprehensive guide, we will help you understand common Vaillant boiler fault codes and provide expert advice on troubleshooting and fixing these issues. By the end, you’ll have a better understanding of the most common faults, their causes, and the appropriate steps to resolve them.
The F22 fault code is often encountered in Vaillant Ecotec Plus and Ecotec Pro boilers, especially the Vaillant Ecotec Pro 28. This error indicates a pressure or water shortage in the system. Modern boilers are equipped with sensors to monitor water pressure, and when a drop is detected, the boiler displays an error code.
Fixing the F22 Boiler Fault: A Comprehensive Approach
Although many online sources recommend using the filling loop to increase the pressure, this is not a long-term solution. Boilers don’t lose pressure without reason, so it’s crucial to address the underlying issue. A Gas Engineer must assess the situation to determine the actual cause and fix it.
The F27 boiler fault occurs when the flame sensor detects an incorrect flame. Several factors can cause this error, including a malfunctioning PCB, a faulty gas valve, or a defective flame sensor.
How to Address the F27 Boiler Fault: Expert Intervention Required
Unfortunately, this is not an easy problem to troubleshoot. A Gas Engineer must inspect the boiler and its components to diagnose the issue and determine the most cost-effective solution.
The F28 and F29 boiler faults are related to gas supply issues. These error codes are usually displayed after a boiler lockout, resulting in a loss of heating or hot water.
Fixing the F29/F28 Boiler Faults: Calling in the Professionals
Gas-related faults should only be addressed by a Gas Engineer. If you suspect a gas supply issue, first check other gas appliances in your home. If the issue persists, a Gas Engineer will need to examine the boiler and assess its components.
The F61 boiler fault indicates a problem with the gas valve, which may be stuck or seized. In this case, the PCB will detect the issue and cut off the gas supply. A Gas Safe engineer must assess and repair the damage.
The F75 boiler fault is prevalent in the Eco Tec Plus and Eco Tec Pro 28 boilers. The service manual will list three possible fault scenarios: a defective central heating pump, a faulty pressure sensor, or both.
Fixing the F75 Boiler Fault: Determining the Cause and Taking Action
The F75 fault is often caused by the pump. Older Vaillant boilers used unreliable Wilo pumps, which were prone to failure. A quick manual check can help identify pump issues. If the pump is the culprit, a Gas Engineer can replace it for around £300, including installation.
Pressure Sensor Problems:
Older Vaillant pressure sensors were not particularly durable and were revised multiple times. Debris buildup in heating systems can block the pressure sensor, causing it to malfunction. A Gas Engineer can diagnose and replace the pressure sensor, typically costing just under £250.
Will a Vaillant boiler service in London Fix these errors?
Some of the errors can be fixed during a Vaillant service if you let us know if you have any issues before hand and we can make sure we are prepared.