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Central heating on all the time!

Hi I switch the heating on for the first time in 5 months. The heating stays on all the time. I have checked the Honeywell junction box box everything wires through and have found there is no power going to the Drayton thermostat downstairs and no power to the Drayton Cylinder stat! When you turn down the heating from the room stat you no longer hear a click in temp change and the heating is on full blast. Can any one help?

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The zone valve needs replacing.

Posted on Sep 26, 2009

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