EC
Black+Decker
Refrigerant System / Low Refrigerant or Sensor Error
Dehumidifier shows EC and stops cooling/dehumidifying
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Low refrigerant charge due to leak, Blocked capillary tube or expansion device, Faulty evaporator temperature sensor, Main control board misinterpreting coil temperature
How to Fix / Troubleshooting
Safety: Unplug the unit before inspection. Do not attempt to cut or open refrigerant lines; this must be done by a licensed professional.
Steps to address EC:
- Check ambient temperature: Ensure the room is within the operating range. Very low ambient temperatures can cause EC on some models.
- Clean filters and coils: Remove and clean the air filter. Inspect and gently clean the evaporator and condenser coils with a soft brush to ensure good airflow.
- Observe coil behavior: Run the unit for 15–20 minutes. If the evaporator coil does not get uniformly cool or only a small section frosts, the system may be low on refrigerant or restricted.
- Sensor inspection: Verify the evaporator temperature sensor is properly attached to the coil and wiring is intact (see E2 steps). Replace the sensor if it is damaged.
- Professional service: If EC persists and the coil does not frost evenly, the sealed system likely has a leak or restriction. Contact an authorized service center; sealed system repair (leak check, evacuation, recharge) is not a DIY task.
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Repair Difficulty
Professional Required
5/5
Required Part
Sealed Refrigeration System
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