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Hi I am writing this to before I go out and buy a new programmer. My progammer seems to work but when in the off position or when timer is off the boiler come on and it seems to be doing this from the room thermostat. I have tested the voltage on the thermostat and when the programmer...

Hi I don't if anyone can help with this one. I have just replaced a very old beige Honeywell Mechanical themostat with a shinny new Honeywell T6360B. The problem is that when the programmer (potterton EP2002) is off the heating will still come on this seems to be the thermostat...