Unit displays E2 and will not start dehumidifying; fan may or may not run.

Safety: Disconnect power before opening the cabinet. Avoid bending refrigerant tubing around the evaporator.

Troubleshooting steps:

• Reset: Unplug for 5–10 minutes and restart. If E2 reappears, proceed.
• Access the evaporator: Remove the front panel and air filter. Remove any screws securing the front shroud to expose the evaporator coil.
• Locate the evaporator thermistor: It is usually clipped to the evaporator fins or copper tubing, with 2 wires leading back to the PCB.
• Visual inspection: Check that the sensor is firmly attached to the coil and not hanging loose. Look for corrosion or moisture damage at the connector.
• Test the sensor: Disconnect the thermistor and measure resistance at room temperature. Compare to the expected NTC value (often 5–20 kΩ at 25°C). If reading is open or near 0 Ω, the sensor is defective.
• Check harness and PCB: If the sensor is good, inspect the harness for cuts or pinches. Measure continuity from sensor plug to PCB. If wiring is good, the PCB sensor circuit may be faulty.
• Replace as needed: Replace the evaporator temperature sensor (coil thermistor) if out of spec. If replacing the sensor does not clear E2, replace the main control PCB.

Note: Do not use soldering near refrigerant lines; use the original style clip or bracket to mount the new sensor.