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Vaillant F29 fault code repair
This page contains the information required to help repair and diagnose the fault codes being shown on the boiler display. The following information, will take you through the fault finding sequence or steps, for rectifying a Vaillant Ecotec boiler with this fault code. Suggested solutions will be detailed further down the page.
Models applicable to:
Ecotec Pro/Plus, Ecotec Exclusive, Ecofit Pure
Failure during operation: Re-ignition unsuccessful
According to the Vaillant Installation and Service book, the F29 fault code means ‘Gas supply temporarily stopped, flue gas recirculation, condensate duct blocked, defective earthing of product, ignition transformer has spark failure’
Statistical chances of faults
1. 40% Approx chance of Gas Supply Fault
2. 33% Approx chance of Gas Valve Fault
3. 30% Approx chance of other reasons being at fault.
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