LO
Whynter
Low Temperature / Anti‑Freeze Protection
Display shows LO and unit does not cool; may indicate low temperature or sensor reading.
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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 below operating range, Evaporator sensor detecting freezing, Thermistor misplacement, Low refrigerant causing coil freeze
How to Fix / Troubleshooting
Safety: Unplug the unit before opening panels.
- Check room temperature: Ensure the room is within the unit's specified operating range (typically above 60°F/16°C).
- Allow thawing: If the evaporator coil is iced over, turn the unit off and let it thaw completely. Do not chip ice with sharp tools.
- Clean filter and coil: Restricted airflow can cause freezing. Clean the air filter and vacuum dust from the evaporator coil.
- Verify sensor placement: Ensure the evaporator sensor is properly attached to the coil and not exposed directly to cold air stream only.
- Refrigerant issue: If freezing recurs quickly, the system may be low on refrigerant or have a metering issue. This requires a licensed HVAC technician to check pressures and repair leaks.
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Repair Difficulty
Hard
4/5
Required Part
Evaporator Temperature Sensor
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