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after fitting a reconditioned heat exchanger to a ten year old greenstar 24ri we are still encountering problems with lack of heat in the radiators. the return pipe remains stone cold although plenty of heat to the flow pipe.. we are getting a chirping noise on the pump and the green burn light...

we have a open vented ten rad ten year old system run by a worcester greenstar 24ri. we replaced a failed pump to a system that was only managing a max of 4 rads luke warm. we have replaced 3 way switch and actuvator then we discovered the system was critically sludged up so removed and flushed...

i have a worcester gas boiler that has recently been serviced and a replacement pump to a 10 year old system. Thermostat and 3 way switch seems to work fine. Heating up to the hot water ok to the tank, but cannot get more than 4 out of the 9 radiators anything more than moderatly warm no matter...