Heat Controller Comfort-Aire BD-81 User Manual (English)

Questions and Answers:

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Casey WoodsJul 30, 2025
Why is my Heat Controller Air Conditioner running but not cooling?
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  David SimmonsJul 30, 2025
  If your Heat Controller Air Conditioner is running but not cooling effectively, several factors could be the cause. First, ensure that cold air circulation is smooth. Check the outdoor coil (heat exchanger) and its fan operation. Also, review if there's been an increase in heat load. Other potential issues include gas leakage (repair the leak if found), incorrect inside gas pressure, or clogging in the refrigeration circuit (repair any clogging in the inlet and outlet). Adjusting the refrigerant charge may also help. If the unit is beyond repair or the compressor is faulty, replacement of either the compressor or the entire unit might be necessary. Ensure that the auto air-swing is off.
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Kathleen LongAug 5, 2025
What to do if my Heat Controller Comfort-Aire BD-81 Air Conditioner fails to start?
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  liuphillipAug 5, 2025
  If your Heat Controller Air Conditioner fails to start, begin by checking the power source, circuit breaker, and fuse. Inspect the control switch and capacitor. If any of these components are faulty, consider replacement of the capacitor, fan motor, or compressor.
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Kelsey LeeAug 20, 2025
How to reduce fan motor noise in my Heat Controller Air Conditioner?
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  Anne WarrenAug 20, 2025
  To address fan motor noise in your Heat Controller Air Conditioner: * Check the grommets and replace them if they are worn or missing. * If the fan or turbo fan is cracked, out of balance, or partially missing, replace it. * Tighten any loose set screws. * If knocking sounds continue when running, or the bearings are loose, replace the motor. Also, replace the motor if it hums or the noise appears internal while running.
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cherylwongAug 25, 2025
What to do if Heat Controller Comfort-Aire BD-81 Air Conditioner fan motor runs intermittently?
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  David PeckAug 25, 2025
  If the fan motor in your Heat Controller Air Conditioner runs intermittently, check the voltage against the limits specified on page 27. If it's not within those limits, call an electrician. Also, test the capacitor and check the bearings. Ensure the fan blade rotates freely; if not, replace the fan motor. Pay attention to any change from high speed to low speed; if the speed does not change, replace the motor.