Ravenheat csi85t boiler pump switches on & off every 5 mins?
Hi, My Ravenheat csi85t boiler pump switches on & off every 5 minutes, the boiler does not light so there is no call for heat & apart from this the boiler is working fine could anyone give me some advise as to what may be wrong. also the boiler is situated in the loft which is well insulated so ambient temperature is not the issue, cheers
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