central heating fault with rads Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[whipleg]

hi there i hope you can help me..my problem is a simple one but i can not work out the fault..when i put our boiler to water only and turn it on the upstairs radiators come on also.as you can see it is a very simple problem not so easy to work out why..hope you can help me..i would be very grateful for any reply.......cheers nicko

[stoneyboy]

whipleg,
Youve probably got a motorised valve in the system which is stuck partly open - find it and free it.
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