Hi I have a baxi bermuda back boiler when it is operating for hot water only there is no problem the pilot light stays on and plenty hot water. but if we put on the c/h also after a short time the pilot light goes out. we relight it but again a lttle later the same problem it goes out again if we turn c/h of then relight with just hot water on there is no problem any ideas please.

rab, June 2007

because the boiler does not know if you want ch, hw, or both, the only reason I can think of is that the pilot may need cleaning, as the boiler is on for a lot longer when you have the ch on the flue is heating a lot more causing a greater updraught and pulling the pilot off of the thermocouple.
basically check and clean the pilot injector and renew the thermocouple.

gary.wright53@googlemail.com, March 2008