Vaillant Group is currently one of the market leading boiler systems, winning several awards over the years. There is, however, a chance that faults could occur from time to time. Having to determine if the error code displayed matches the fault can lead to uncertainty and can be very stressful.
If you are seeing an error code on your machine, check our run-through here of common fault codes to find out what the code means, and what’s caused it.
F20
This error code indicates that your boiler has overheated and it needs time to be allowed for it to cool down and return to an acceptable temperature. This is possibly caused by an incorrect earth connection between the cable and the boiler.
F22
If you see an F22 code displayed, it is likely that the water pressure is too low or non-existent and the boiler will switch off as a safety precaution. This can also signal that the pressure sensor is faulty or the cable to pump is not connected properly.
F24
F24 is indicative of a pump fault which could have become blocked, failed or overrun. There could also be an issue with the air lock, with air inside the boiler.
F28
Boilers with an error during start-up will show an F28 fault. This means that the boiler cannot ignite, which may be due to the gas meter being defective, or a triggered pressure regulator. Detective electronics within the boiler, in particular the ignition system, can also be the cause.
F32
F32 shows an issue with the fan inside your boiler, such as the fan not plugged in properly, a blockage or a break in the cable harness.
F68
If your boiler has an unstable flame signal fault, you’ll see an F68 fault code. This can be caused by a variety of issues such as a blocked condensate pump, flow interruption from the cables or wrong air ratio.
F77
This code demonstrates that there’s no response from the flue or condensate pump which means there’s a fault with one of them.
If your boiler is showing any of the codes above, make sure you enlist the assistance of a professional heating engineer to resolve the problem efficiently. Bristol-based boiler expert DHS has over 40 years of experience in dealing with boilers. If you have a problem with your heating system, don’t hesitate to contact us and let us handle your boiler repair in Bristol.
Call DHS today on 0117 924 7200, email us, or request a callback.
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