I have a Halsted Quatro boiler and it works perfectly when you turn a tap on to get hot water, but when you try the heating for the radiators the fan doesnt kick in?? Checked through the problem diagram and still unsure because the fan works with the hot water?? Help!

Alan Glover, October 2008

this might be a silly question but have you checked to see if your room stat is turned up, little square box on wall with temp/control dial on it

herbie, October 2008