I have a Potterton Suprima 9016 boiler which was linked into the existing system.I have also had a loft conversion (from a bungalow) with 1 rad upstairs(5 rads downstairs)Header tank is at least 5' above highest rad.
The potterton had a new Circuit board fitted(most recent Engineer).I...
When I turn on my hot water switch, the radiators get hot. I have had two Corgi registered fitters round to sort the problem out but to no avail.Have had new valve/pump plus other bits and pieces (over £500 !) and still back to square one ! Any suggestions would be most apreciated. :cry: