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Central Heating & Storage Heaters Forum
Pump Overrun' and 'Fan post-purge
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<blockquote data-quote="phil d" data-source="post: 445203" data-attributes="member: 27126"><p>The fan runs first, then if the sensors are happy with the readings the pcb starts the pump, followed by the ignition, if boiler won't fire then it's the pcb that is stopping it from running, However this doesn't mean it's a faulty pcb, it could be any one of a number of things, a common one is a sticky fan, we had one on ours doing that, a spray with lubricant and it would run for weeks then fail again. It could be a pressure switch, it could be a split hose, there are loads of things it could be, as others have said, get a heating engineer in otherwise it can work out really expensive. A bloke near me had a problem and the engineer quoted him £90 to fix it, he thought it was a pcb, but either way for 90 quid he'd guarantee a working boiler. The guy thought he was being ripped off so bought the part and asked me to fit it, the pcb was £85, and not returnable, I fitted it and charged him £30, the boiler still didn't run! In the end it cost him nearly £200 for me to get bit working, and he was moaning about paying the heating engineer 90 quid.</p></blockquote><p></p>
[QUOTE="phil d, post: 445203, member: 27126"] The fan runs first, then if the sensors are happy with the readings the pcb starts the pump, followed by the ignition, if boiler won't fire then it's the pcb that is stopping it from running, However this doesn't mean it's a faulty pcb, it could be any one of a number of things, a common one is a sticky fan, we had one on ours doing that, a spray with lubricant and it would run for weeks then fail again. It could be a pressure switch, it could be a split hose, there are loads of things it could be, as others have said, get a heating engineer in otherwise it can work out really expensive. A bloke near me had a problem and the engineer quoted him £90 to fix it, he thought it was a pcb, but either way for 90 quid he'd guarantee a working boiler. The guy thought he was being ripped off so bought the part and asked me to fit it, the pcb was £85, and not returnable, I fitted it and charged him £30, the boiler still didn't run! In the end it cost him nearly £200 for me to get bit working, and he was moaning about paying the heating engineer 90 quid. [/QUOTE]
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Pump Overrun' and 'Fan post-purge
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