SPRSUN
Coil Icing / Defrost Problem
Ice forms on the evaporator coil and/or base of the unit; airflow is reduced.
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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 ambient temperature with high humidity, Defrost cycle not initiating properly, Low refrigerant charge, Restricted airflow through coil
How to Fix / Troubleshooting
Safety first: Turn off power before removing ice manually. Do not use sharp tools.
- Defrost the unit: Turn the heater off and allow all ice to melt naturally. Ensure the condensate can drain away.
- Check airflow: Clean the coil and remove any obstructions around the unit to improve air movement.
- Verify defrost operation: During cold weather, observe whether the unit periodically enters defrost mode (fan stops, different sound). If not, the defrost sensor or control may be faulty.
- Monitor frequency: Occasional light icing that clears during defrost is normal. Heavy, persistent icing indicates a problem requiring technician service to check refrigerant charge and defrost controls.
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Repair Difficulty
Medium
3/5
Required Part
Defrost Temperature Sensor
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