LO
Whynter Low Temperature Lockout

Dehumidifier displays LO and does not start dehumidifying

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Possible Causes

Room temperature below minimum operating range, Ambient thermistor reading too low, Unit placed near cold draft or window, Faulty ambient temperature sensor

How to Fix / Troubleshooting

Safety first: Unplug the unit before relocating it.

Steps to resolve LO:

  • Check room temperature: Confirm the room is above the minimum operating temperature listed in your Whynter manual (often around 41°F / 5°C).
  • Relocate the unit: Move the dehumidifier away from cold windows, exterior doors, or unheated areas.
  • Allow warm-up: Let the unit sit unplugged in a warmer room for at least 30 minutes, then plug in and test.
  • Sensor inspection: If LO appears even in a warm room, the ambient thermistor may be faulty and require replacement.
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Repair Difficulty

Easy 2/5

Required Part

Ambient Temperature Thermistor
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