De'Longhi dehumidifier shows EC on the display and stops dehumidifying; fan may still run.

Safety first: Unplug the unit before inspection. Do not attempt to open the sealed refrigeration system or handle refrigerant yourself.

Step-by-step:

• 1. Power reset: Unplug the dehumidifier for 5 minutes, then plug it back in and restart. Sometimes EC can be triggered by a transient sensor error.
• 2. Check ambient temperature: Ensure the room is within the operating range (typically 5–35°C). Operating below 5°C can cause abnormal pressures and error codes.
• 3. Clean condenser and evaporator: Remove the air filter and inspect the visible coils. If they are covered in dust, gently vacuum with a soft brush. Do not use sharp tools or high-pressure water.
• 4. Listen for compressor operation: After starting the unit, wait a few minutes. You should hear the compressor hum and feel warm air from the exhaust. If the compressor never starts or starts then quickly stops and EC appears, there may be a compressor or pressure sensor fault.
• 5. Check for oil stains or frost patterns: With the cover on, look through the grille for unusual frost buildup on only a small section of the coil or oily residue around tubing joints—both can indicate refrigerant leaks.
• 6. Call a professional: If cleaning and reset do not clear EC, the issue is likely in the sealed system (refrigerant leak, blocked capillary, faulty pressure sensor, or compressor). These require specialized tools and must be handled by an authorized De'Longhi service center.