Dehumidifier shows P3 and does not start the compressor

Understanding P3: On some GE models, P3 indicates the room is too cold for safe operation.

Steps to address P3:

• Measure room temperature: Use a separate thermometer to confirm the actual room temperature. If it is below about 65°F (18°C), move the unit to a warmer area.
• Allow warm-up: If the unit was stored in a cold garage or basement, let it sit unplugged in a warmer room for several hours before use.
• Check sensor placement: Ensure the ambient temperature sensor is properly located near the air intake and not touching cold metal surfaces that could skew readings.
• Inspect sensor wiring: Look for damage or loose connections at the ambient sensor and control board.
• Replace sensor or board: If the room is warm but P3 persists, replace the ambient temperature sensor. If that does not resolve the issue, the main control board may be faulty.

Note: Running a dehumidifier in very cold spaces is ineffective and can damage the unit.