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potterton, s plan, system fault
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<blockquote data-quote="chrishaworth" data-source="post: 201110" data-attributes="member: 639"><p>99.9% chance the plumber has got the wiring wrong. Different boilers have different terminals for LNE, switched live, room stat, cylinder stat etc. It's quite likely that he noted down the terminal number that each wire went to on the old boiler and connected them to the same terminals on the new boiler. You'll need the boiler manual and a bit of tracing to get the right terminals. Valve bodies do occasionally stick, but to have 2 doing it at the same time is stretching coincidence. Anyway, even if both valves were stuck open, the boiler still should not fire if the programmer is not calling for heat or hot water as there should be no supply to the grey wires on the valves. Patience and persistence are required. (The third P is if you can't fix it, get pi**ed).</p><p></p><p>Cheers. Chris</p></blockquote><p></p>
[QUOTE="chrishaworth, post: 201110, member: 639"] 99.9% chance the plumber has got the wiring wrong. Different boilers have different terminals for LNE, switched live, room stat, cylinder stat etc. It's quite likely that he noted down the terminal number that each wire went to on the old boiler and connected them to the same terminals on the new boiler. You'll need the boiler manual and a bit of tracing to get the right terminals. Valve bodies do occasionally stick, but to have 2 doing it at the same time is stretching coincidence. Anyway, even if both valves were stuck open, the boiler still should not fire if the programmer is not calling for heat or hot water as there should be no supply to the grey wires on the valves. Patience and persistence are required. (The third P is if you can't fix it, get pi**ed). Cheers. Chris [/QUOTE]
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