Why is my TH1100DH/TH1110DH/TH1210DH showing an error message LO? What does it mean?
Last updated
2/22/22
LO – The ambient temperature is below 32F (0 degrees C) Remember it can take several hours for a newly installed thermostat to normalize to room temperature. If the room temperature is above below 32F (0 degrees C) and the thermostat is still displaying LO replace the thermostat.
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