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  1. R

    replacing an RS1 thermostat with Honeywell DT90E

    Hello, I have searched the forum and have done this exact same thing as Mick but the heating ios not coming on in the morning. Is there any suggestions to assist me please.
  2. R

    Honeywell DT90E thermostat issue

    Hi, This is my first post so please be gentle. i'm having the same issue as above, would someone be able to assist please. When working it's great but the heating is not automatically coming on in the morning. The temp is set to 23 Programmer is set to come on at 5am...
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