hot water is fine but central heating intermittent, potterton puma?
Hi
Any pointers??, I have a potterton muma 80 combi boiler, hot water is fine but central heating is very intermittent will not even kick in on when switched to contstant, had the heat exchange valve changed and seemed to work fine for a few weeks but now has reverted back to the way it was before...please help....
colin, January 2010
