honeywell C21

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honeywell C21

Postby andyk on Sat Oct 10, 2009 1:30 pm

hi, i have a problem with my central heating system, the central heating pump runs constantly, i have turned th CH off at the honeywell C21 controller but it continues to run 24hrs, the thermastat is not calling for heat either, is there a fault with the controller
thanks for any help
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Joined: Sat Oct 10, 2009 1:27 pm

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