my boiler has been intermitantly firing up,running for a short time and stopping.it will not fire up at all now.could it be the pcb?its a Glow-worm micron 60ff.when i switch on the boiler only the fan runs.

jack armitage, July 2009

gloworm micron 60ff changed pcb and safetytemp limiter. boiler fires up for 5sec then off then fires up again and stays on.but sometimes the boiler is not running ,when I check the burner light is flashing and reset light is on . When I switch temp button off then on it returns to above. It does this afew times aday.Any idea? P.S. I fitted this boiler myself about 7years ago.

bernie lancaster, November 2009

you should get indication from leds on boiler. If its air pressure switch fan will run, cut out,run again, if pressure switch is problem leds will be as follows
fast flashing on reset, slow flashing on burner.

Air pressure switches not usual fault with boiler though

Andy, July 2009

whats the leds doing on the front ?

hi-spec plumbing & heating (essex), July 2009

If the fan is running then it sounds more like an air pressure switch problem.

Ian, July 2009