Central heating technical problem

[jangler]

Yes, agree, but I shall do this with only one radaiator opened, then close it and go round the compete system, opening and closing radiator valves, so that maximum pressure is going through each radiator line.

After that it is the power flush, if that doesnt work

The pump is a Grundfos Selectric

 

[jangler]

Hi ChrisR,

You were spot on correct! The cold water feed 'T' point was full of crusty sludge/coke, nice one!

The power flush should do the trick ! Thanks