Dehumidifier stops and displays E1 on the control panel; fan may still run briefly then shut off.

Safety first: Unplug the Sharp dehumidifier before removing any covers. Capacitors on the control board can hold a charge briefly after unplugging.

Steps to check and address E1:

• Power reset: Unplug the unit for 5–10 minutes, then plug back in and try again. If E1 returns immediately, continue.
• Access the control area: Remove the front or rear panel (depending on model) to access the main control PCB and sensor harnesses. Keep screws organized.
• Locate the room temperature sensor: On Sharp dehumidifiers, this is usually a small thermistor probe clipped near the air intake grille or evaporator inlet, connected by two thin wires to the main PCB.
• Inspect wiring and connectors: Look for broken wires, pinched harnesses, or loose/corroded plugs. Reseat the sensor connector on the main PCB firmly.
• Check sensor resistance: With a multimeter set to kΩ, measure resistance across the sensor leads at room temperature (~20–25°C). Typical NTC thermistors read between 5–50 kΩ. If it reads open (OL) or near 0 Ω, the sensor is defective.
• Replace if faulty: If resistance is out of spec or the wiring is damaged, replace the ambient temperature sensor (room thermistor) with a Sharp-compatible part. Route the new sensor in the same position and clip it securely.
• Board inspection: If the sensor tests good but E1 persists, inspect the main control PCB for burnt components or corrosion around the sensor input. In that case, replacing the main control PCB is usually required.

When to call a technician: If you are not comfortable using a multimeter or accessing the control board, or if the PCB appears damaged, contact a qualified appliance technician.