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  1. S

    Central Heating Coming On

    Fantastic it was set to on. You star!! I've changed to 0. Thank you very much.
  2. S

    Central Heating Coming On

    Do you have Optimization switched ON at the CM67? It's Parameter 15:Op = Hmmmmm French :-) Sorry no idea where I would check that.
  3. S

    Central Heating Coming On

    I've looked and can't see a room stat in the loft nor where it was moved from before we moved in; therefore I can only conclude it's default behaviour is to fire up (like the manual states) when 5C is reached ( which I guess must be around 04:00 in the loft) until it senses 30C flow temp...
  4. S

    Central Heating Coming On

    Frost stat? What is one of those, and where would I find it? We have recently moved into our new home and I'm still getting to grips with the boiler etc. Boiler is located in the loft.
  5. S

    Central Heating Coming On

    Hi, I'll try and keep this brief. Problem:- Central Heating coming on out of programed hours @ 04:00 in the morning. Time is set correctly. Setup:- BOILER = Combi Instant 105E Control:- Honeywell CM67RF (wireless) - checked comms all ok 1 to 7 (1 being Monday) Programed...
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