LO
Frigidaire Low Ambient Temperature Protection

Dehumidifier displays LO and does not start dehumidifying; may run fan only.

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Possible Causes

Room temperature below operating range, Faulty ambient temperature sensor reading too low, Unit placed near cold draft or exterior wall, Control board miscalibration

How to Fix / Troubleshooting

Note: LO is often informational, indicating the room is too cold for safe operation.

Steps:

  • Check room temperature: Use a separate thermometer to verify the room is above 41°F / 5°C. If not, move the unit to a warmer area.
  • Avoid cold drafts: Do not place the unit directly on a cold concrete floor or next to an exterior door or window where cold air can affect the sensor.
  • Power reset: Unplug for 5 minutes, then plug back in and check if LO clears in a warmer environment.
  • Sensor check: If the room is clearly warm (e.g., 70°F / 21°C) but LO remains, inspect the ambient temperature sensor and its wiring for damage or dislodging.
  • Replace sensor if needed: A faulty ambient thermistor can falsely report low temperature and should be replaced.
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Repair Difficulty

Easy 2/5

Required Part

Ambient Temperature Sensor (Thermistor)
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