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HomeRepair HelpBryant Central A/C RepairBryant Central air conditioner coil icing up Repair
Bryant Central air conditioner coil icing up
When your Bryant central air conditioner coil is icing up, the evaporator coil may be freezing because airflow through the furnace or air handler is restricted. First, check whether the humidifier damper is open. Set it to summer mode or the closed position so air does not bypass the coil. Next, inspect the blower motor, which circulates air through the system. A seized motor, failed motor, or defective run capacitor or capacitor can keep the blower from running. Also check the blower wheel and housing for dust and debris that restrict airflow, and clean them carefully without bending the sharp fins. These are the most likely causes of an AC coil freezing up, evaporator coil frozen condition, or air conditioner freezing up. A faulty thermal expansion valve, or TXV, can also allow the wrong amount of refrigerant into the coil and cause AC icing over. Turn off the system and let the ice melt before testing or replacing parts. Disconnect power before servicing, and treat 240-volt components as beyond basic DIY work. TXV or refrigerant repairs require an EPA 608-certified, licensed HVAC technician. Enter your Bryant model number to find the exact replacement blower motor, capacitor, blower wheel, or other 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 - Bryant 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 - Bryant 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 - Bryant 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 - Bryant 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 - Bryant 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 Bryant central air conditioner coil freezing up?
Can a bad blower motor or dirty blower wheel cause an air conditioner coil to freeze?
How do I test the Bryant central air conditioner run capacitor?
Could a bad TXV cause my Bryant central air conditioner to freeze up?
How do I find the correct Bryant central air conditioner replacement part?
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