Potterton supreme boiler won't come on after being off during the summer. The indicator light just slowly flashes orange. Also I can hear a very faint single clicking sound which repeats after a gap of a few seconds as though something is trying to turn on. This boiler is used with a gledhill boilermate and l can hear the pumps are working in the boilermate. Does someone know what the problem is likely to be please?

Polly, December 2014

red lock on light came on yesterday never had this before checked pressure that was ok tried reset would not work what do u suggest

Will, March 2015