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HomeRepair HelpHaier Central A/C RepairHaier Central air conditioner coil icing up Repair
Haier Central air conditioner coil icing up
If your Haier central air conditioner has an evaporator coil frozen or is showing signs of AC icing over, restricted airflow is the most likely cause. First, check whether the humidifier damper is open. Set it to summer mode or the closed position so air does not bypass the evaporator coil. Next, inspect the blower motor in the furnace or air handler. A failed motor, seized bearings, or a blower wheel that will not turn freely can stop airflow and cause the AC coil to freeze up. A clogged or damaged blower wheel and housing is another common cause, followed by a defective run capacitor or capacitor that prevents the blower motor from running. If airflow is normal, a faulty thermal expansion valve, or TXV, may be overfeeding or underfeeding refrigerant to the evaporator coil. Turn off power and let the coil thaw before inspecting parts, and use caution around capacitors and 240V wiring. Testing or replacing line-voltage components may require a qualified technician, while TXV or any sealed-system refrigerant repair requires an EPA 608-certified, licensed HVAC technician. Enter your model number to find the exact Haier replacement part for your central air conditioner.
01 - Humidifier Damper is Open
An open humidifier damper will let air bypass the evaporator coil. This loss of air flow can cause the evaporator coil to freeze up. If you have a humidifier on your furnace or air handler, confirm the humidifer damper is in the "summer mode" or closed position.
Highly Likely
02 - Haier Central Air Conditioner Blower Motor
Since the furnace or air handler blower motor is the component that circulates the air through unit to cool it, a defective blower motor could result in the evaporator coil icing up. You can use a multimeter to test the blower motor for electrical continuity, a continuous electrical path present in the motor, as well as determine if power is reaching the motor. You can also try turning the blower wheel by hand. If the wheel does not turn freely, it's likely the motor bearings have seized and the blower motor will need to be replaced.
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Highly Likely
03 - Haier Central Air Conditioner Blower Wheel and Housing
Over time the blower wheel and housing can become clogged with dust and debris. This will restrict the air flow which could result in the evaporator coil icing up. You can try cleaning the blower wheel with compressed air or with a soft bristle brush. Use caution when trying to clean the blower wheel as the fins are sharp and can be easily damaged. If the blower is damaged it will need to be replaced.
Common
04 - Haier Central Air Conditioner Run Capacitor
If the run capacitor is defective, the blower fan motor may fail to run which could result in the evaporator coil icing up. To determine if the run capacitor has failed, test the capacitor with a multimeter. If the capacitor is unable to hold and release a charge or is bulging or leaking, replace it.
Common
05 - Haier Central Air Conditioner Capacitor
If the capacitor is defective, the blower fan motor may fail to run which could result in the evaporator coil icing up. To determine if the capacitor has failed, test the capacitor with a multimeter. If the capacitor is unable to hold and release a charge or is bulging or leaking, replace it.
Common
06 - Haier Central Air Conditioner Thermal Expansion Valve
A thermal expansion valve, commonly referred to as a TXV, regulates the amount of refrigerant in the evaporator coil to help maintain an optimal working temperature.
Common
Frequently Asked Questions
Why is my Haier central air conditioner coil freezing up?
Can a blower motor or blower wheel cause my AC coil to freeze up?
How do I test the run capacitor when my AC blower is not running?
What should I check if my central air conditioner is blowing weak air and icing up?
How do I identify the correct Haier central air conditioner replacement part?
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