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How to Test Your Air Conditioning
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 Concerned that your air conditioner isn't cooling properly? Hold a thermometer to the air coming out of the register, and compare it to the reading on the wall thermostat. The air coming out of the register should be 15-20+ degrees colder. If not, the unit may need servicing, and may need additional refrigerant added. Have the service technician clean the outside unit as well, including the coils.
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