Dehumidifier stops and displays E1 on the control panel; buttons may not respond or unit may not start.

Safety first: Unplug the Gree dehumidifier before removing any panels. Do not work on the unit while it is connected to power.

Steps to check and correct:

• Power reset: Unplug the unit for 5–10 minutes, then plug back in and try again. Sometimes E1 can be a transient sensor read error.
• Access the sensor: Remove the front or side cover (usually several Phillips screws). Locate the small probe-type sensor clipped to the evaporator coil or near the air inlet labeled as the ambient or room NTC sensor.
• Inspect wiring: Check the thin sensor wires from the probe to the main control PCB. Look for cuts, pinches, or disconnections. Reseat the connector on the PCB.
• Check sensor resistance: With a multimeter set to kΩ, measure resistance across the sensor leads (with the unit unplugged). At room temperature (~25°C), most Gree NTC sensors read around 5–10 kΩ. If the reading is open (OL) or near 0 Ω, the sensor is defective.
• Replace if faulty: If resistance is out of spec or wiring is damaged, replace the ambient temperature sensor (NTC) with a Gree-compatible part. Route the new sensor along the original path and secure it with clips or zip ties away from moving parts.
• Inspect control board: If a known-good sensor still gives E1, inspect the main PCB for burnt components or corrosion. In that case, the main control board may need replacement.

When to stop: If you are not comfortable using a multimeter or removing covers, contact a qualified appliance technician.