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  1. R

    New froststat clicking/lighting up but no response from boiler

    Hi, I switched my old Honeywell froststat (it had a broken mount and was firing up boiler) to the cheap Greenbrook TH90F. This is clicking and lighting up when i turn the temp gauge up, (currently 13 degrees C), but no response from boiler. Frost thermostat terminals are wired as instructions...
  2. R

    Froststat is wired to permanent live, from the boiler switch, is this right?

    Hi, May I seek advice? House/boiler is mid-90's. I am updating my froststat (it physically broke internally and has been firing up boiler inappropriately) and I have found that it is on a PERMANENT live feed (on voltage checking) despite the boiler switch overriding its effect, (ie fully...
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