Dehumidifier shows P3 and stops compressor operation.

Steps:

• Verify room temperature: Use a separate thermometer to confirm the room is above the minimum temperature specified in the manual (often 5–7°C). If not, move the unit to a warmer area.
• Relocate the unit: Avoid placing the dehumidifier directly on a very cold floor or next to an open window in winter, as this can cause the sensor to read too low.
• Sensor check: If the room is warm but P3 persists, inspect and test the ambient NTC sensor as described for E1.
• Board issue: If the sensor is good, the main PCB may be misreading temperature and require replacement.