:lol: YES that's done it thanks holmslaw, your a star :lol: all working and pump switches off when Room stat turned down.
Yes it was fine the only reason I replaced the timer was because the plastic lugs broke off and could not set the timer.
Many thanks, tried this and Boiler fires up when I select heating on but the pump does not run, turnt uo the room stat and still no pump running. :(
Can anyone help with what wires I should connect to a new Horstmann Channel plus H27XL.
I have a gravity HW and Pumped CH system with...
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