Dehumidifier displays F4 and shuts down compressor

Safety: Unplug the unit and allow it to cool before working near the compressor.

Steps to address F4:

• Access compressor area: Remove the rear or side panel to expose the compressor and condenser coil.
• Locate high-temp sensor: Look for a thermistor or thermal protector attached to the compressor discharge line or condenser coil.
• Check mounting: Ensure the sensor is firmly attached and not hanging loose.
• Inspect wiring: Look for heat-damaged insulation or loose connectors.
• Replace sensor: If the sensor appears damaged or F4 persists, replace it with a GE-compatible high-temperature sensor.
• Control board: If a new sensor does not resolve F4, the main control board may be misreading temperature and should be replaced.

Warning: Do not bypass thermal protection devices; they prevent overheating and fire risk.