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Vaillant — ecoTEC Plus
Select a fault code
Fault Codes
F.22Low water pressure🔄 Try Reset
The system pressure has dropped below minimum. One of the most common Vaillant fault codes.
F.28Ignition failure🔄 Try Reset
The boiler has attempted to ignite but failed after multiple attempts.
F.29Flame loss during operation🔄 Try Reset
The boiler lit but the flame extinguished unexpectedly.
F.62Gas valve leak detected🔧 Engineer Required
The gas valve is not closing properly, causing a safety lockout.
F.63PCB memory fault🔧 Engineer Required
A fault has been detected in the main circuit board memory.
F.75Pump or pressure sensor🔧 Engineer Required
No pressure change detected when the pump started.
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