E9 displayed, unit shuts down unexpectedly during operation

Safety: Disconnect power before accessing internal components.

Steps:

• 1. Check ambient conditions: Verify the room temperature is within the operating range specified by Ebac (typically above 3–5°C for many models). If the space is too cold, relocate the unit or provide supplemental heat.
• 2. Inspect evaporator sensor: Access the evaporator coil and confirm the sensor is firmly attached to the coil surface. Reattach with the original clip or aluminum tape if loose.
• 3. Examine for heavy frost: If the coil is heavily iced, unplug the unit and allow it to defrost completely. Clean the air filter and ensure airflow is not restricted.
• 4. Sensor test: Measure the evaporator sensor resistance at known temperatures and compare to Ebac specifications. Replace the sensor if readings are out of range.
• 5. Control board evaluation: If the sensor is good and ambient conditions are correct, the defrost algorithm on the main PCB may be malfunctioning. Replacement of the control board may be necessary.

Note: Operating the dehumidifier in very cold environments can cause frequent defrost cycles and E9 errors; consider a low-temperature Ebac model for such applications.