not firing on a morning or night on 1st demand, CH/rad light flashing anyone had this problem. it does fire after resetting but its getting more frequent, pointing towards the pcb according to the MI anyone else had this problem.
Occasionally it ccould be the air pressure swicth of a dodgy governor on the meter but the last time it turned out to be the pcb and it was cheaper for the customer to call out Worcester on a fixed price repair.
i too had a sticking gas valve although it failed rather than being intermittant. a 1 flash a sec on CH light indicates ingnition or flame failure which could mean anything.
Mine was intermittant at first, usually going first thing in the morning. Then it started doing it in the evening and then it went altogether. I had to sort it out then. Rate of flash indicated"Fail point H" if I remember correctly.
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