Question about Honeywell Heating & Cooling
My ST9400C is set on "Auto" but it keeps changing to "continuous" for no reason I can work out
How old are the batteries? You may want to replace them to see if it helps. If it doesn't then get a new thermostat. Nothing inside the AC/Heater will cause that.
Posted on Mar 29, 2014
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Posted on Jan 02, 2017
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Page 12 of the user manual explains this:
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