Dehumidifier stops and displays E2 on the control panel

Safety: Unplug the unit before opening any panels. Coil fins are sharp; wear gloves.

Steps:

• Reset attempt: Unplug for 5–10 minutes, then plug back in. If E2 returns immediately, proceed with inspection.
• Access the evaporator: Remove the water bucket and front grille. Take out screws holding the front or rear housing to expose the evaporator coil (the cold aluminum fins).
• Locate the coil sensor: Find the small thermistor clipped or taped directly to the evaporator tubing or fins. It usually has two thin wires leading back to the control board.
• Inspect wiring: Look for crushed, cut, or pulled wires, especially where they pass through metal brackets. Repair minor insulation damage with high-quality electrical tape; replace the sensor if conductors are broken.
• Check the connector: Follow the sensor wires to the control board and reseat the plug. Ensure no pins are bent or corroded.
• Test the thermistor: With the unit unplugged, disconnect the sensor and measure resistance. Compare to the service spec for your Insignia model. A reading of infinite (open) or near 0 ohms (short) indicates a bad sensor.
• Replace sensor: Install an Insignia-compatible evaporator temperature sensor. Clip or tape it firmly to the same coil location to ensure proper temperature sensing.
• Reassemble: Refit all covers and the bucket, then power on and confirm the E2 code is gone and the unit runs through a full cycle.

Note: If E2 persists with a known-good sensor, the main control board may have a defective sensor input circuit.