Potterton performa 24 is heating rads ok but little hot water?

Probably the diaphragm in the diverter valve. service kits available. have you tried getting estimetes from local plumbers or sevice people? it can be done by do-it-yourself but you need a basic understanding of plumbing and mechanacal equipment, not so much to do it but to know what to do if it goes wrong .

Terry
May 2007