Dehumidifier shows EC and stops dehumidifying; fan may continue to run.

Safety: Unplug the unit. Refrigerant is under pressure; do not puncture coils or tubing.

• Visual inspection: Remove front cover to inspect the evaporator coil. Look for oily residue on the fins or tubing, which can indicate a refrigerant leak.
• Check for frost pattern: If the unit has been running, a very small frost patch on part of the coil (instead of even cooling) can indicate low refrigerant.
• Clean coils and filter: Ensure airflow is not restricted, as poor airflow can also cause abnormal coil temperatures. Clean filter and coils as described in other entries.
• Inspect evaporator sensor: Confirm the sensor is firmly attached to the coil and wiring is intact. Replace the sensor if it appears damaged.
• Reset and test: After cleaning and sensor check, unplug for 5–10 minutes, then restart. If EC returns, a sealed system issue is likely.
• Professional repair required: Locating and repairing refrigerant leaks, evacuating, and recharging the system must be done by a certified technician with proper equipment.