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Hot Water Fine, but no Central Heating

Posted: Fri Oct 12, 2007 9:56 am
by davethewave
Hi – I’m having a most odd issue with my Potterton Lynx 2 Combi Boiler.

The hot water works fine. However, if I go to switch the central heating on, the boiler makes a quiet whirring noise, but nothing else happens, no lights, no firing up and no heat. However, if I turn on a hot water tap (in the bathroom in this case) and then switch on the central heating, it springs to life. Anyone got any ideas, this has just started to happen.

Posted: Sat Oct 13, 2007 2:13 am
by The Heating Doctor
Sounds like a problem with the diverter valve in your combi.