S
supersnad
I don't know if i'm posting this in the right place as I've never used this forum before.I have a Potterton Combi Boiler and on occasions the heating system doen't fire up when using the room thermostat but if I turn on the hot water tap which fires up o.k. then turn the water off the heater works fine.Like I said it's just on the odd occasion which is baffling me.Can anybody give me any advice.Brian