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Can anyone help me please? I have a Honeywell thermostat (HCW80) with a receiver and the boiler works fine for hot water but the central heating keeps switching off and I have to restart the receiver or turn the thermostat down and up again to start it. Also the timer doesn't seem to be working for the second programme. I have replaced the thermostat batteries. When i press the button on the receiver there is a green light and the radiator sign comes up on the boiler but the radiator sign on the boiler goes out and I have to keep trying until it ignites again. I have had the whole set for a number of years with no problem. Many thanks if anyone can help me here please. Nothing has changed in my home for this to happen.