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Discuss Wiring s plan from old set up y plan...? in the UK Plumbing Forum | Plumbing Advice area at PlumbersForums.net

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Your missing something as the pump would run
 
Time for a rewire and start from scratch bell the existing cables out to see what you’ve got down stairs and adjust in the box to match
 
Just follow the picture I sent etc eg you will be fine
 

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So turn the heating on prog should give you 240 to the room stat

Turn the room stat up you should have 240v on the 2 port brown and the 2 port lever should go slack

Correct ?
 
So turn the heating on prog should give you 240 to the room stat

Turn the room stat up you should have 240v on the 2 port brown and the 2 port lever should go slack

Correct ?
Il check after my scampi and chips🤣
Just now, i called for hw, time i got to boiler, pump was running, boiler screen was live, but not lit up, boiler wasnt firing, cover off valve, lever had moved and pressing switch, pulled supply to brown, pump stopped, lever released, boiler screen shut down...
 
NB the colours of the cables except from the zone valves could be misleading to say the very least.

I recommend you confirm all the connections

does your boiler need PL and SL ?
 
NB the colours of the cables except from the zone valves could be misleading to say the very least.

I recommend you confirm all the connections

does your boiler need PL and SL ?

Yes 330 does need both
 
Im not sure tbh. What happened. I took front off boiler, messed with the sensors on flow and return, i took the cover off the board, removed it, contact spray and cleaned all connectors, found a couple of small areas of corrosion, reassembled.
Re bled rads, bled the air valve on the hw coil return.
It fired on hw demand.

Going to let it run and warm for a bit. Then try the hot water side of things...
May not be home and dry yet, but its progress.
Again many thanks for all your help.
 

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