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and thanks for correcting me Gordon it is an S plan not a Y like I said, whoops! :oops:

I have had a look at what you said and the results are as follows There are 5 terminals on PTT2 from left to right H C L TL and N According to what I can see they go like this H = SLW C = Grey on valve L = 3 on programmer TL = Valve brown and N to neutral I tried connecting H...

cheers, will do tommorrow and report back.

EP2002

PTT2 so it says on it

yes sorry I meant ptt, will check what you said, cheers.

I have looked at the wiring diagram and although I know very little about electrics, it doesnt look like the diagram :shock: It cant be the immersion heater as there isnt one. The only thing I dont understand is that the water problem has been like it since I moved in but the heating...

I don't know if anyone can help me with this problem but any advice would be appreciated. I have a Y plan system with the dreaded Potterton suprima boiler, a ppt tank stat and ptr room stat and 2 2 port motorised valves. The first problem is the water never stops heating, I assumed that the...