Question about Heating & Cooling
Sounds like it's locked or in the wrong mode.
First check that you're in cooling (or heating) mode, and not just fan.
Without the model or maker I can be general in saying that you may have a small lock switch on the t-stat... or there's a setup/settings option to lock the temp so that others don't keep moving it up and down.
If you don't have the user guide, the manufacturer's website should have the guide available, or even have a Q&A or FAQ page that will tell you how to lock/unlock the temperature adjustment.
Also, make sure the batteries are good if it's powered thusly. Try a fresh battery to check if that's the case. If it's direct-wired then that won't matter.
A more extreme tactic would be to turn off the power to the whole unit for 5-10 minutes... There should be a disconnect nearby the outside unit with a handle to cut the power.. or a box with a breaker inside. If that's not outside then you should have one in your main breaker box inside.
Posted on Jan 04, 2011
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Posted on Jan 02, 2017
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