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Hi Tony Thanks for your reply, don't worry i am not touching anything to do with the boiler. My biggest puzzle is the fact that it has been firing up even this morning but why it will not now. When i mentioned the valve before i meant my three port central heating valve not anything...

Hi I have recently had problems with the boiler which seem to have got worse. Recently replace the PCB with the refurbished one. all working fine for a few days. strangely the programmer had to be set hot water and central heating off for them to come on and we couldn't have...