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Hot Water but no central heating

Postby suckotri » Fri Aug 31, 2007 7:37 pm


When I switch central heating only on, the pump starts up, the boiler kicks in and I get heating.

However, if I then switch the hot water on as well, I get hot water but then the rads go cold!

I've two motorised valves which seem to activate.

Any thoughts. I have a pumped system.


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