Well after all the dilemma with no heating over Christmas then that sorted, then the flue needed changing then that sorted! And just a couple of weeks ago we needed a new water tank urgently and that was done and completed. Last Friday OH went to turn the heating on and nothing! The piolet light wouldn't turn on, nothing!! So yet again the heating man came ' you need a new piolet coupling!' and we have to order it for this system so will take a couple of days sorry!' So yet again we had no heating over the weekend! And yesterday the part arrived and the man came and fitted it for us, just in time for todays freezing cold weather! Our heating system has all brand new parts now!!