There is normally a "minimum cooling set point" setting in the tstat. it doesn't matter if you have wifi or not you have to read the manual and change the setting. Do you really need your house cooler than 69???
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Didnt specify what stat but if you dont have internet or the app or doesnt have a manual override need to change to a conventional stat
SOURCE: fan on but no heat
I never liked the user un-friendliness of the Chromatherm, I would suggest finding a thermostat that you can understand and operate. Yes the Chromatherm is a good one, but so damned hard to figure out. Stay away from thermostats that still use mercury. Good Luck!
SOURCE: Honeywell Digital Thermostat won't click on if temp is below 59
do you live there? if so here are the rules for setting back temperature: do not lower the temperature more than 8 degrees F from the temperature you want it when your there, setting it back for periods of less than eight hours is also somewhat futile. Due to laws of thermo-dynamics the heat required to recover from more extreme setbacks or shorter periods of time exceeds the savings acquired by taking said action. As to your question directly there are no reasons why your thermostat should not function at any setpoint temperature that it is allowed to set to (45 normally being the lowest) if it does not function below 58 degrees it has a failure and should be replaced before it fails completely. Suggest a Robertshaw or Braeburn brand thermostat, Honeywell quality has slipped over the past decade to unacceptable levels. Unless your considering a Hunter in which case buy another Honeywell.
SOURCE: My Honeywell TH4210D1005 Thermostat will not respond
well with 62 outside temp and then maybe a little solar gain and body heat you very well could be 5 degrees warmer then outside
SOURCE: can not get temp below 77
Is the thermostat set up for automatic change over from heat to cool? If so, the heat is probably set for 75, you will need to lower the heat setting in order to Lower the cooling. the stat won't let these settings with in 2 degrees of each other so the heating and cooling don't fight each other.
SOURCE: When this thermostat is in the HOLD position,
If you still have the instructions for the thermostat, then it will show you how to get into the menu and set the swing on the temps. I would try to explain off the top of my head, but its actually quite a bit off numbers to remember. Hope it helps somehow.
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