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thanks guys Wish you could have posted earlier Undercover. The guy who fixed it said there was a problem with a resistence reading on the gas valve. He has replaced the whole valve and it is working now.

Hi Guys. My first post and i need your help. I'm having problems with the above boiler. The heating and hot water will only come on for about 10 mins before the boiler switches off. I have noticed that there is a flickering red light next to the high/low thermostat switch on the boiler...