hi, can anyone shed some light on this problem, 400rsf highflow hot water overheating , this boiler has had new dh exchanger, new manifolds,pump,diverter, and primary heat exchanger, 3 new sets of thermostats all fitted by bg, problem they cant solve is this, when hot water is on heatbank emptys completely before the boiler fires up to re heat it, it then continues to heat the water untill the thermostat gose of the scale and the water is far too hot,this boiler used to fire up after about 30sec when hot water was called for,it no longer dose this, at my whits end with it as bg are saying they dont know what could be wrong with it, considering what they have already replaced on it, is it possable that the pcb could be faulty,,bg have tested this but say it ok, dont know what else prob could be,
worcester 400 rsf problem
- Thread starter gmzx
- Start date
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Better posted in plumbing. 
Maybe the mods will move it for you.
Maybe the mods will move it for you.
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