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After getting some great advice on here a year ago which fixed the problem, I thought i'd try again with my latest heating problem... Over the last few weeks the hot water to the taps has been getting more and more lukewarm. The HW tank stat is fairly new and both motorised valves seem to be...

Hi, I trying to figure why a Potterton Prima 60F keeps firing up even when the room stat is down and the timeclock is set to off for both HW and CH. When everything is off, the gas valve solenoids are still getting driven from the circuit board. It's a bit concerning, has anybody heard of...