LG · Refrigerator Serious

Er CF — Condenser fan motor feedback fault

The condenser fan at the back/bottom of the cabinet didn't return its speed feedback signal for the required time (typically more than 65 seconds during operation). Without it, the compressor will eventually overheat and shut down on the high-side cutout.

Keep using it?
Limited use only
DIY difficulty
Moderate
Typical cost
$40-90
Verified against
lg.com ↗

The fix

Condenser fan motor

Condenser fan motor circuit error

$40-90 moderate difficulty 60 min Tools: screwdriver, nut driver

Diagnose first: Dust buildup or a failed bearing stalls the fan; clean the condenser coil at the same time.

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How to fix it

  1. Unplug the refrigerator and pull it out from the wall.
  2. Remove the rear lower access panel to expose the condenser and fan.
  3. Vacuum out dust/pet hair from the condenser coil and around the fan.
  4. Spin the fan by hand — should turn freely. If stiff, replace the fan motor.
  5. Inspect and reseat the fan harness connector to the main board.
  6. If a new fan motor doesn't clear Er CF, suspect the main PCB.

Why it happens

Typical signs: Er CF on display · Refrigerator and freezer warming together · Hot exterior at compressor area · Buzzing or no airflow noise from back/bottom of unit · Compressor short-cycles or shuts off

  • Failed condenser fan motor Bearings seized, blade stalled, or BLDC electronics failed.
  • Debris blocking fan Pet hair / dust mat in the condenser area stalls the blade.
  • Disconnected/damaged fan harness Loose connector at the fan or main board.
  • Main control board Drive or feedback circuit failed.

Other parts sometimes needed

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Condenser coil brush Common replacement
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Related repair guides

How to Clean Refrigerator Condenser Coils →Refrigerator Making Noise — What Each Sound Means →

More LG refrigerator codes

22 22 — Compressor relay / inverter control fault 33 33 — Compressor / defrost test fault 67 67 — Door open / not fully closed 88 88 — Power-on display test (not a fault) Er CO Er CO — Communication error (main board ↔ display) Er dH Er dH — Defrost cycle exceeded time limit

All LG codes → All refrigerator codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.