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Aug 30, 2025
Worked as a replacement for my defective...
Worked as a replacement for my defective iComfort thermostat. Installing on wall is easy. You may be able to use the existing iComfort holes. I suggest to seal the hole in the wall that the wires come out of with foam or some other material. This may prevent a draft affecting the thermostat’s temperature readings. The S40 requires two apps to be downloaded. One for the settings in the HVAC which most leave as default. The other is for configuring features of the thermostat such as schedules.