Each time I turn on the heating or the hot water, the flame fires up on my boiler but only stays on for 20 secs. It then shuts off for about 4 mins and then trys to start up again but only stays lit for 20 secs. Does anyone know what the problem could be and if this would be an expensive job!? Thanks ..
Vaillant boiler - flame stays on for 20 secs only
- Thread starter shaz77
- Start date
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