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can anyone tell me how to allow my underfloor heating stat to fire my boiler.I have a 24v Broag heating boiler which is controlled by a switched live from my Honeywell y plan system.I connected another switched live from my conservatory ufh stat and the rcd protecting the boiler tripped out.I...

my myson,which is 21yrs old is making a loud banging noise when it is fully hot.i have changed the 3way valve and pump.when it banged again i checked the pump and found that it was not running,although there was 240v to it.the room stat,cylinder stat were made,also the boiler was running.i...