Dehumidifier shows P3 and will not start the compressor.

Note: P3 often indicates the unit is protecting itself from operating in too cold an environment.

Steps to handle P3:

• Measure room temperature: Use a thermometer to confirm the room is above the minimum operating temperature listed in the manual (commonly 5–10°C / 41–50°F). If not, move the unit to a warmer space.
• Allow warm-up: If the unit was stored in a cold area, bring it indoors and let it sit unplugged for 1–2 hours to reach room temperature before use.
• Check evaporator sensor: If P3 appears even in a warm room, inspect the evaporator temperature sensor for proper attachment and wiring (see E2). Replace if readings are out of range.
• Control board: If sensor replacement does not clear P3, the main control PCB may be faulty and require replacement.