What does SY EF mean?
Evaporator fan motor circuit has failed.
Common causes
- Failed evaporator fan motor
- Ice buildup jamming fan
- Wiring issue
- Control board failure
Diagnostic & testing steps
- 1. Listen for fan running when doors closed
- 2. Check for ice buildup around fan
- 3. Test fan motor - apply 12VDC directly
- 4. Measure motor resistance: 10-30 ohms
- 5. Check control board output voltage
Tools required
- Multimeter
- 12V power supply
- Phillips screwdriver
OEM parts & part numbers
Evaporator Fan Motor
Part numbers: WPW10189703, W10124096
Safety warning
⚠️ Unplug before accessing fan motor
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