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  1. J

    Please help with my Honeywell CM927 dilemma!

    I replaced my old Honeywell thermostat with a new CM927 today but... it doesnt work... Power light is on - remote thermostat turns unit on at right temperature, but boiler doesnt fire up... I have reinstalled the old thermostat in case I had blown a fuse somewhere but that works perfectly...
  2. J

    Replacing old Honeywell EE4 with Honeywell CM927 - HELP

    I replaced my old Honeywell thermostat with a new CM927 today but... it doesnt work... Power light is on - remote thermostat turns unit on at right temperature, but boiler doesnt fire up... I have reinstalled the old thermostat in case I had blown a fuse somewhere but that works perfectly...
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