Please can somebody help?
I have a Baxi Solo 3 Boiler, everything was running fine and one night a loud clunking noise was coming from the CH system (yes I agree air) after then I turned the pump speed up to push the air around and out and it worked as I heard the air (bubbles) coming out from the tank.

Ever since then my Grundfos 15-60 pump will not turn off unless I turn it off by the fuse? Also I have turned the speed back down to 2.

Any help please

Andy

Andy, June 2009

Thank A
I have tried that but with no joy

Andy, June 2009

Try reseting, turn off boiler stat and turn back on again, the pump over run is part of the circuit board

a, June 2009