I have a 28CDi combi boiler, when the water gets hot the pilot light keeps going out, so then the water gets cold. Does anyone know what the fault maybe. Cheers.

Ron Lock, September 2008

Three causes:-
1) Pilot light partially blocked making an unstable flame which easily blows out when the main burner shuts down--If pilot has a yellow tinged flame, clean it out
2) Pilot flame too low & not staying in contact with thermocouple probe--Adjust pilot size.
3) Early sign of the thermocouple begining to fail.--replace it.

Cledlyn, September 2008