Lg Air Conditioner - Air Conditioner Won't Turn Off As debris builds up on the coils, the air conditioner will become less efficient, causing the air conditioner to work harder to cool down. If the coils are significantly dirty, the air conditioner will not be able to maintain the proper temperature, and the compressor will run continuously in Electric Motor Starting Capacitor Selection  "Kenmore model 580. 75121 room unit air conditioner wiring diagram", Sears Roebuck window air conditioner wiring diagram for a typical room or window air conditioner; George Fazio, reader, contributed comments on failed starter capacitor diagnosis by noting the bulged capacitor Make an Electric Motor Run Again : 6 Steps (with Pictures The most common cause of HVAC failure during the hot summer is a motor capacitor. (Your air conditioner does not run, but just hums with a buzzing sound.) Knowing that, you can use what you find in this Instructable to check your system and replace the capacitor even before it fails.
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