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HomeRepair HelpMaytag Central A/C RepairMaytag Central air conditioner coil icing up Repair
Maytag Central air conditioner coil icing up
Is your Maytag central air conditioner coil icing up? Turn the system off and allow the evaporator coil to thaw before testing it. The most likely cause is an open humidifier damper, which lets air bypass the coil and reduces airflow; set the damper to summer mode or the closed position. Next, check the furnace or air handler blower motor. A failed motor, seized bearings, or a blower wheel that will not turn freely can cause an evaporator coil frozen condition. A clogged or damaged blower wheel and housing can also restrict airflow and lead to AC coil freezing up, so clean it carefully with compressed air or a soft brush. If the blower does not run, a failed run capacitor or capacitor may be responsible. A defective thermal expansion valve, or TXV, can also cause AC icing over by misregulating refrigerant flow. Enter your model number to find the exact Maytag replacement part for your central air conditioner. You can inspect the damper and clean the blower wheel yourself, but disconnect power before testing or replacing electrical parts. Blower motor, capacitor, TXV, and any refrigerant or sealed-system repair may involve 240V electricity or require an EPA 608-certified, licensed HVAC technician.
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 - Maytag 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 - Maytag 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 - Maytag 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 - Maytag 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 - Maytag 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 Maytag central AC coil freezing up?
Can a blower motor cause my air conditioner to freeze up or stop cooling?
What should I check if my central AC has weak airflow and the evaporator coil is frozen?
Can a bad AC capacitor make the blower motor stop and cause coil icing?
How do I find the correct Maytag central air conditioner part for a frozen coil repair?
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