Carrier
Evaporator Coil Icing
Carrier air conditioner indoor unit freezes up with ice on the 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
Low airflow due to dirty filter or blower, Low refrigerant charge, Thermostat set too low, Closed supply registers
How to Fix / Troubleshooting
Safety: Turn OFF the system to prevent compressor damage.
- Step 1 – Thaw the coil: Turn the system OFF and allow ice to melt completely. Place towels to catch water.
- Step 2 – Clean filter and blower: Clean or replace the filter and ensure the blower wheel is clean.
- Step 3 – Open registers: Make sure all supply and return registers are open and unobstructed.
- Step 4 – Adjust thermostat: Avoid setting the thermostat extremely low (e.g., below 68°F/20°C for long periods).
- Step 5 – Technician check: If icing recurs, a Carrier technician should check refrigerant charge and system pressures.
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Repair Difficulty
Medium
3/5
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