The boiler pilot light goes does not stay on, once the pilot light is started and I turn the thermostat is turned up the boiler starts up and stays on for around 30 to 60 seconds then goes out completely.
Has anyone got any ideas on what I can check or needs replacing before going mad and changing all sorts of parts ?
Possibly a stuck pump, therefore your boiler reaches temp very quickly and goes off?
Angus
Do you mean that the pilot light will stay lit if the boiler isn't firing but goes out (and the burners too) after the burner fires?
If so, it could be that the flame failure thermocouple (capillary device from pilot to gas valve) is on its way out. These can be obtained as a universal type for about £3 from plumbers merchants or DIY stores. I would suggest replacing that first.
Also check that the pilot jet is clean and producing enough of a flame to heat the thermocouple properly.
Beyond these, you would probably be into needing replacement of expensive components like the gas valve. On a boiler of this age, that would be a questionnable investment.
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