Hi my boiler has been working fine until to-night when the fan will not switch off without a reset. CH and DHW function as normal. LED 5 ( mains pressure/ electrical circuit warning led) is permanently illuminated until either a reset or manual switch off. when called for boiler functions fine, burner switches off but fan continies.

Any suggestions

Thanks

mal, August 2008

Hi

Is it the combi boiler with automatic ignition? Does than fan turn off after demand and then hunt - or is the fan continous running after demand.

I would suspect fault is with the pcb- i am sure i have come across this fault before

Matt, September 2008