creaking noise from radiators?

i'm assuming it's a gravity h/water pumped heating system it may be that the system is faulty and if you've fitted a high performance pump (a grundfos 15/60 etc.) then the pump is still sucking air in try pump speed 1 if that doesn't work and it is air in the system then the expansion pipe may need altering or an air separator fitting

brian
March 2011

Pump is at 2 setting.

Old Codger
March 2011

check pump speed it only needs to be on 2 any higher and it will suck air into the system

brian
March 2011

Hot water radiator system linked by copper pipework to a gas fired convential boiler. Thermostatic valves on radiators

Old Codger
March 2011

what system do you have

brian
March 2011