Hi there, My parents CH has just stopped working but there appears to have been a few events which may explain the reason. Over the past few months the heating has been very noisy and just this weekend one of the upstairs radiators was not working so i bled it and after releasing much water it soon warmed up. However the very next day the heating did not come on, the pump appears to run bu the boiler does not fire up. The pump appeared to be very warm but was working (pipes either side were cool so the heat was pump generated). I have checked the pump by removing the cover an watching the spindle rotate but I am not convinced that it is fully fit... Is it possible that the motor spindle could be rotating without the pump turning or could the pump have worn to the point where it cannot produce enough flow. Also, would this stop the boiler firing up...? By the way, the pump is a Wilo Gold 067. Any thoughts would be greatly appreciated. 
