Tempstar
Evaporator Coil Icing
Tempstar air conditioner indoor unit freezes up with ice on the evaporator coil
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Dirty air filter, Low indoor airflow due to closed vents or duct issues, Low refrigerant charge, Blower motor running at incorrect speed
How to Fix / Troubleshooting
Safety first: Turn OFF cooling mode at the thermostat to prevent compressor damage.
Steps:
- 1. Thaw the coil: Set thermostat fan to ON and leave system off for cooling for several hours until all ice melts. Place towels near the air handler to catch water.
- 2. Replace air filter: Install a clean filter.
- 3. Open vents: Ensure all supply and return vents are open and unobstructed.
- 4. Inspect blower operation: Confirm strong airflow with fan ON.
- 5. If icing recurs: Low refrigerant or incorrect blower settings may be the cause; have a technician check charge and airflow setup.
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Repair Difficulty
Medium
3/5
Required Part
Evaporator Coil
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