Dehumidifier displays EC and does not dehumidify effectively

Safety: Unplug the unit. Do not attempt to open the sealed refrigerant system unless you are certified and equipped.

Steps to troubleshoot EC:

• Check airflow: Clean the air filter and coils. Poor airflow can mimic low refrigerant symptoms and trigger EC.
• Observe coil behavior: With the unit running (if possible), inspect the evaporator coil. If only a small section frosts or if there is no cooling at all, this suggests a sealed system issue.
• Inspect temperature sensors: Check both evaporator and condenser thermistors for secure mounting and intact wiring. Test resistance values and replace any sensor that reads open/short or out of spec.
• Look for oil stains: Oil residue on tubing or joints can indicate a refrigerant leak. Do not attempt to braze or recharge without proper training.
• Contact a professional for sealed system repair: If airflow and sensors are good but EC persists and cooling is poor, a licensed technician must check pressures, locate leaks, and recharge or replace components.

Test: After any sensor replacement or professional sealed system repair, verify that EC does not return and that the unit collects water normally.