Dehumidifier shows E3 and compressor will not run

Safety first: Unplug the unit before accessing the control panel or internal components.

• Step 1 – Power reset: Disconnect power for 5–10 minutes, then restart. If E3 returns, proceed.
• Step 2 – Locate humidity sensor: On many Danby models, the RH sensor is mounted behind the front grille or near the air intake, connected by a small harness to the control board.
• Step 3 – Inspect sensor and wiring: Remove the front panel/control panel to access the sensor. Check for dust buildup, moisture damage, or corrosion. Ensure the connector is fully seated on the board.
• Step 4 – Clean gently: If the sensor is dusty, gently blow off dust with dry compressed air. Do not use liquid cleaners on the sensor element.
• Step 5 – Replace sensor: If E3 persists, replace the humidity sensor assembly with a Danby-compatible part. Mount it in the same location to ensure accurate readings.

When to call a technician: If a new humidity sensor does not resolve E3, the main PCB may be defective and should be evaluated by a service professional.