Whynter 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

Room temperature too low, Restricted airflow from dirty filter, Low refrigerant charge, Faulty defrost sensor or control

How to Fix / Troubleshooting

Safety first: Turn OFF and unplug the unit. Do not attempt to chip away ice with sharp tools.

Steps to address icing:

  • Defrost completely: Allow the unit to sit unplugged until all ice has melted and the drain pan is empty.
  • Clean filter and coils: Wash the filter and vacuum dust from the evaporator coil.
  • Check room temperature: Ensure the room is within the recommended operating range. If too cold, relocate the unit.

If icing recurs in a warm room with clean filters, a refrigerant or sensor issue is likely and should be checked by a technician.

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Repair Difficulty

Hard 4/5

Required Part

Defrost Thermistor
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