Crane smart humidifier with built-in humidistat shows E6 and ignores humidity setpoint.

Safety first: Unplug the unit before removing any covers or sensor housings.

• 1. Locate the humidity sensor:
  • On many Crane models, the RH sensor is behind a small vented grille on the side or rear of the housing.
  • Some models use a wired external sensor probe.
• 2. Clean the sensor area:
  • Use a soft brush or compressed air to remove dust from the sensor grille.
  • Do not spray cleaners directly onto the sensor.
• 3. Check connections:
  • Open the housing and trace the small sensor cable to the control PCB.
  • Ensure the connector is fully seated and not corroded.
• 4. Dry out condensation:
  • If the sensor area is visibly wet, allow the unit to dry completely for several hours in a warm, dry room.
• 5. Replace sensor if needed:
  • If E6 persists after cleaning and drying, replace the humidity sensor module with a compatible Crane part.