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This is a thru-the-wall unit with supplemental heat capability. If it's plugged in, the compressor runs. Everything seems to work fine except the compressor won't stop running. When it got to be 62 degrees in my office, I had to unplug it. I took off the front, removed the circuit board behind the control panel and everything looked good there - I wasn't sure about going any deeper or even what to check. Thermostat sticking someplace? Where and how to get to it seemed daunting... Any advice/links/videos much appreciated. Thank you!