Dehumidifier shows E7 and stops; fan may run but no dehumidification

Safety: Unplug the unit before accessing the evaporator area.

Steps:

• Locate defrost sensor: On many Sencor dehumidifiers, the defrost sensor is the same as or similar to the evaporator NTC, clipped to the lower part of the evaporator coil where ice forms first.
• Check mounting: Ensure the sensor is firmly attached to the coil. A loose sensor can misread temperature and trigger E7.
• Inspect wiring: Look for nicks, pinches, or broken insulation on the sensor leads. Reseat the connector on the main PCB.
• Measure resistance: With the sensor disconnected, measure resistance at room temperature and compare to specifications or to the ambient NTC sensor. A large discrepancy indicates a faulty sensor.
• Replace sensor: Install a new Sencor defrost NTC sensor if readings are out of range or if the sensor is physically damaged.
• PCB check: If the sensor is good and properly mounted, the defrost control circuit on the main PCB may be defective and require replacement.

Note: Excessive ice buildup on the evaporator can also be caused by low ambient temperature; ensure the unit is used within the recommended room temperature range.