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Renewed room thermostat and 3 port valve(drayton MA1) but hot water fires up OK but not central heating unless I turn off hot water timer settings on drayton lp522 controller?
Discuss Central heating not firing up is controller at fault r in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Remember as I am sure you know, somewires are 240volts even when no demandThanks for replying.. I'm going to recheck all the wiring today.. This all started over a failed room thermostat and the new one shows voltage when calling for heat and 0volts when not so that works.. I will check wiring centre in airing cupboard but at controller end it is buried in the wall in a huge ball! I will report back my findings later as I'm a DIY but I do have engineering knowledge.
Reply to Central heating not firing up is controller at fault r in the Plumbing Jobs | The Job-board area at PlumbersForums.net
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