SOURCE: Honeywell thermostat not lowering temperature
remove batteries let sit a few minutes reinstall.
if still bad replace they are not servicable
Testimonial: "Thanks a lot for your help. I'll try that -- very simple!"
SOURCE: Incorrect ambient temperature on Honeywell Model RTH221B
Check in your manual for the thermostat. By pushing a combination of buttons you can get into the advanced installer menu. From there you can make an adjustment to correct the temperature.
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