Models applicable to:
Ecotec Pro/Plus, Ecotec Exclusive, Ecofit Pure
Welcome to the fault-codes section of this site. The following table or page contains the information required to help repair and diagnose the fault codes being shown on the boiler display. You may be guided through the fault finding sequence or steps, for rectifying your boiler with this fault code. Suggested repair solutions may be provided by a link to a repair page. NB Some fault codes are only applicable to a specific range of boilers only.
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’
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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