Crane dehumidifier shows E9 and the compressor does not start.

Safety first: Unplug the dehumidifier before removing panels. Refrigerant system work must be done by an EPA-certified technician.

• 1. Listen for compressor attempt:
  • Plug in and start the unit; listen for a humming or clicking from the compressor area.
  • Repeated clicking without running suggests a start relay or overload issue.
• 2. Inspect electrical components:
  • Unplug and remove the rear panel to access the compressor terminals.
  • Check the PTC start relay and overload protector for burn marks or loose connections.
• 3. Basic electrical tests (advanced):
  • Use a multimeter to check continuity of the overload protector.
  • Measure compressor winding resistance between terminals; open windings indicate a failed compressor.
• 4. Refrigerant issues:
  • If the compressor runs but there is no cooling on the evaporator coil, the system may be low on refrigerant or have a blockage.
  • Do not attempt to open the sealed system yourself.
• 5. Professional service:
  • If E9 persists after replacing the start relay/overload and verifying wiring, contact a qualified refrigeration technician or Crane service center.