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HomeRepair HelpKelvinator Central A/C RepairKelvinator Central air conditioner coil icing up Repair
Kelvinator Central air conditioner coil icing up
If your Kelvinator central air conditioner coil freezes up, the evaporator coil may be icing over because air cannot move across it or because the refrigerant system is not regulating correctly. Start with the humidifier damper, which should be closed or set to summer mode so air does not bypass the evaporator coil. Next, check the blower motor in the furnace or air handler. 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 air conditioner freezing up, so clean the wheel 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, is another possible cause because it controls refrigerant flow through the evaporator coil. Turn off power before inspecting components, and remember that electrical testing and capacitor replacement can involve hazardous line voltage. TXV, refrigerant, and any sealed-system repair require an EPA 608-certified HVAC technician. Enter your model number to find the exact Kelvinator 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 - Kelvinator 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 - Kelvinator 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 - Kelvinator 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 - Kelvinator 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 - Kelvinator 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 Kelvinator central air conditioner coil freezing up?
What should I check when my central AC has weak airflow and the coil is icing over?
Can a bad run capacitor cause an evaporator coil to freeze up?
Could a humidifier damper cause my air conditioner to freeze up?
How do I find the correct Kelvinator central air conditioner part for my repair?
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