I have just spent 400.00 pounds getting a new hot water cylinder fitted and a new motorised valve aand a considerable amount of time draining the system down and flushing the radiators out. the boiler lights up for about 1 min then the gas cuts off. the pump is rumming but i cant get heat or hot water. Is it the thermocouple in the boiler ?

Gil Povey, March 2009

Sounds like the system is airlocked.This boiler doesnt have a t/couple.

Tony S, March 2009