Carrier Evaporator Coil Icing

Dehumidifier coils freeze into a solid block of ice during operation.

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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 room temperature, Restricted airflow from dirty filter or coil, Faulty defrost sensor, Low refrigerant charge

How to Fix / Troubleshooting

Safety first: Unplug the unit and allow all ice to melt before further inspection. Place towels to catch water.

Steps:

  • 1. Check room temperature: Use the dehumidifier only within Carrier’s specified temperature range (typically above 65°F/18°C for best performance).
  • 2. Clean filter and coil: Ensure the air filter and evaporator coil are clean to allow proper airflow.
  • 3. Verify fan operation: Confirm the fan runs continuously when the compressor is on.
  • 4. Inspect defrost sensor: If icing recurs quickly, test and replace the defrost/coil sensor as needed.

Note: Persistent icing despite proper airflow and sensor operation may indicate refrigerant issues requiring a technician.

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Repair Difficulty

Medium 3/5

Required Part

Defrost Thermistor
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