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Pagie1980
Bit of a long story this one not ideal for xmas eve / morning. I have a gas central heating system with a boiler behind the fire downstairs. The hot water tank which was ancient was leaking so my mate who is a plumber replaced the tank. A few days later this started leaking. And some of the water got onto the switch master 3 way valve which then started sticking. So the tank was changed once again as it seemed to be an issue with the tank new tank. Since then things haven't been right I've had to manually switch the 3 way valve and a week or so ago noticed the 2nd new tank was leaking again. So my mates been back and today changed the tank once again. And also this time changed the 3 way valve to a Honeywell model. Well literally just now with both the heating and water switched to off the boiler behind the fire was still on. I found this strange so went to check out the tank and its mad hot. The water has obviously still been heating. The cylinder stat is probably not working at a guess. Or for some reason the boiler is carrying on boiling. I've isolated the boiler now and emptied all the hot water from the tank which was scalding. Once the water was cool again and with the boiler isolated I noticed the central heating pump was still pumping. So I've turned all electrics off now. Now I've heard of wiring differences when switching from switch master to Honeywell. Could it be that something is wired wrong which is causing the boiler to continue. The cylinder stat not to work. And the pump to continue. Greatful for any info at all. It's worrying me as my partners 8 year old son is in the room with the hot water tank. Many thanks in advance.
Stephen.
Stephen.