Dehumidifier displays E6 and will not dehumidify properly; compressor may not start.

Safety first: Unplug the unit before opening the control panel area.

Steps:

• 1. Locate humidity sensor: On Carrier dehumidifiers, the RH sensor is typically mounted behind the front grille near the air intake or integrated into a small module connected to the control board.
• 2. Inspect sensor and wiring: Check for dust buildup on the sensor, broken wires, or a loose connector at the main board. Gently clean the sensor area with dry compressed air; do not use liquid cleaners.
• 3. Reseat connector: Disconnect and reconnect the humidity sensor plug several times to wipe oxidation from the contacts.
• 4. Functional test: If you have access to diagnostics (some Carrier models), compare displayed humidity to a known-good hygrometer. If readings are wildly inaccurate or E6 persists, the sensor is likely bad.
• 5. Replace humidity sensor: Order the correct Carrier humidity sensor or sensor module. Mount it in the same location and orientation to ensure accurate airflow sampling.
• 6. Check control board: If a new sensor does not clear E6, the main control board’s sensor input may be defective and require replacement.

Note: Do not relocate the sensor away from the intake path; this will cause poor humidity control.