our central heating and hot water is making a lot of clanging and banging.
i have drained the system twice fitted a new pump but it is still making the same racket and the radiators down stairs no longer get hot. but the water seems to be overheating i think a thermostat has stopped working but i dont know where it is or how to find it we have a back boiler

colin young, April 2006

sounds like a air lock.is their water at the pump . is their water at the radiators. turn boiler stat to lowest setting does it turn off if so then stat ok. take air realease screw from pump place pan under pump and run heating. are u shure both valves open each side of pump

paul, April 2006