Dehumidifier shows P2 and stops, even though the main tank is empty

Safety: Unplug the unit before adjusting hoses.

Steps:

• Verify drain setup: If using continuous drain, ensure the hose is connected to the correct outlet and slopes downward all the way to the drain point. Remove any loops or upward runs.
• Clear hose: Disconnect the hose and flush it with clean water. Remove any sludge or scale buildup.
• Test without hose: Temporarily remove the continuous drain hose and operate the unit with the standard tank only. If P2 disappears, the issue is with the hose routing or blockage.
• Check pump level sensor (pump models): Inspect the pump float switch or level sensor for sticking or damage. Clean and ensure free movement.
• Replace faulty parts: If the sensor is defective, replace the float switch or pump assembly. Persistent P2 with correct drainage may indicate a main control PCB fault.