Dehumidifier displays E9 and stops, often related to defrosting

Safety: Unplug the Camry dehumidifier before accessing internal components.

Steps:

• 1. Allow unit to warm: If the unit was used in a very cold room, move it to a warmer area (above 10°C) and let it sit unplugged for several hours. Then test again.
• 2. Locate defrost sensor: The defrost NTC is usually attached to the lower part of the evaporator coil or suction line. It may be combined with the evaporator sensor on some models.
• 3. Inspect and test sensor: Check for broken wires or a sensor that has come loose from the coil. Measure resistance at room temperature and compare to specifications (similar range to other NTC sensors). Replace if open or shorted.
• 4. Check connection to PCB: Ensure the defrost sensor connector is firmly seated on the main control board and free of corrosion.
• 5. Replace main PCB if needed: If the sensor and wiring are good but E9 persists, the defrost control circuit on the main PCB may be defective and require board replacement.

Note: Operating a dehumidifier in temperatures below the rated minimum can cause frequent defrost errors; always check the user manual for the recommended operating range.