What does EC mean?
Main control board lost communication with evaporator fan or sensor circuit.
Common causes
- Loose wire connector on evaporator fan
- Failed evaporator fan motor
- Control board communication fault
- Ice buildup interfering with wiring
Diagnostic & testing steps
- 1. Power cycle unit - unplug for 5 minutes
- 2. Access evaporator fan and check connector
- 3. Test evaporator fan motor with 12VDC direct power
- 4. Check for ice buildup on wiring near evaporator
- 5. Inspect main control board for burned components
Tools required
- Multimeter
- 12V power supply
- Phillips screwdriver
OEM parts & part numbers
Evaporator Fan Motor, Main Control Board
Part numbers: PB070246, 002619-000
Safety warning
⚠️ Unplug before accessing evaporator compartment
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