Crane warm & cool mist humidifier shows E5 and warm mist function will not operate.

Safety first: Unplug the humidifier and allow it to cool completely. The heater area can remain hot for several minutes after use.

• 1. Descale heater area:
  • Remove the water tank and empty the base.
  • Fill the heater chamber area with a 1:1 vinegar and water solution and let it soak for 20–30 minutes.
  • Gently scrub with a soft brush to remove scale, then rinse thoroughly.
• 2. Inspect heater assembly:
  • If accessible, remove the bottom cover to view the heater element and thermal fuse.
  • Look for burnt spots, broken wires, or a blown thermal fuse (often a small cylindrical component in heat-shrink tubing).
• 3. Electrical checks (for experienced users):
  • Use a multimeter to check continuity across the heater element; an open circuit indicates a failed heater.
  • Check continuity across the thermal fuse; if open, it must be replaced with the exact temperature and current rating.
• 4. Control board inspection:
  • Inspect the heater relay on the control PCB for burn marks or cracked solder joints.
• 5. Reassemble and test:
  • After cleaning and any part replacement, reassemble and test warm mist mode.
  • If E5 persists, the control board may be defective and should be replaced or serviced by a technician.