How to Reset a Window AC's Thermostat

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Resetting your window air conditioner restores the default settings on the thermostat.

Many of the newer digital air conditioners include programmable thermostats that allow you to not only regulate cooling temperatures, but also select set-point temperatures. Selecting a set-point temperature ensures the unit turns on and off as desired. If your unit does not perform optimally, restore the default factory settings, and then reconfigure them to meet your cooling needs.


Step 1

Press the power button on your window air conditioner to turn it off. Wait about 15 seconds or longer for the power in the compressor and the LED lights to turn off. Disconnect your air conditioner from the electrical power.

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Step 2

Turn on your air conditioner and check the settings on your unit's thermostat to see if they are back to the default settings. If the settings have not changed, turn off your unit again. This time, leave the unit off for at least 20 minutes to an hour to see if the thermostat resets.


Step 3

Press the "Reset" button on your window air conditioner, if it has one. Some of the new air conditioners have a reset button that allows you to restore the default thermostat settings without turning off your unit. Refer to your manual if you're unsure whether your air conditioner has a reset feature.



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