CENTRAL HEATING QUESTION

[MichaelP]

We have a POTTERTON 80 Boiler connected to a GRUNDFOS Pump - sited on one of the garage walls. Since last 3 days there is a large amount of noise coming from the pump - which is providing both cetnral heating and hot water. I suspect it could be some trapped air somewhere in the pipes - but it could be something else - any ideas any one?? The noise is rather disturbing.. Thanks for your help

[BillyNoMates]

Sounds like some trapped air in the pump. Loosen the large silver screw on the top of the main body of the pump until water trickles out. You may have to repeat a few times.