LG · Refrigerator Serious

Er FF — Freezer fan motor abnormality

The freezer (evaporator) fan motor is not running, is running too slowly, or has no feedback signal — most commonly because frost has built up around the fan blade and locked it.

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

The fix

Evaporator (freezer) fan motor

Freezer fan motor circuit error

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

Diagnose first: Fan icing up from a failed defrost system is common; verify defrost heater and thermistor before just swapping the fan.

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How to fix it

  1. Unplug the refrigerator and empty the freezer (and ice bin).
  2. Open both doors and let the unit defrost for 8 hours minimum (24–72 hours if heavily iced).
  3. Towel out melt water as it appears so it doesn't pool on the floor.
  4. Plug back in and watch for 15–20 minutes — if Er FF returns immediately, the fan motor or harness is bad.
  5. Pull the freezer rear panel and spin the fan blade by hand; if it's stiff, replace the freezer fan motor.
  6. Inspect door gasket and hinge alignment so the door fully seals — otherwise frost will return.
  7. If the defrost heater is open or the bi-metal thermostat won't close cold, replace them as a set.

Why it happens

Typical signs: Er FF (or E FF) on display · Freezer warming, ice cream soft · Refrigerator side may also warm · Audible buzz then silence from freezer · Frost on the back panel inside freezer

  • Ice buildup locking the fan blade Worn door gasket or door left ajar lets humid air in, frost grows on the evaporator fan.
  • Failed freezer fan motor BLDC motor bearings seize or the Hall sensor fails — no feedback to the main board.
  • Defrost system failure If the heater or bi-metal/fuse failed, the evaporator ices over and traps the fan.
  • Wiring harness fault Pinched or corroded fan harness at the freezer rear panel.
  • Main control board Less common — board not commanding/reading the fan correctly.

Replace your water filter

A clogged or overdue water filter is a common cause of low water and ice flow on LG refrigerators — they are meant to be changed about every 6 months. The OEM-style filter that fits most LG refrigerators is the LT1000P ($45-55 OEM, $18-28 compatible).

  • LG LT1000P refrigerator water filter OEM water filter
    Amazon →

Not sure which filter fits your model? See the full compatibility guide →

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.

  • Defrost heater + bi-metal kit Common replacement
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  • Door gasket Common replacement
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Related repair guides

Freezer Not Freezing — Troubleshooting Guide →Refrigerator Making Noise — What Each Sound Means →Refrigerator Not Cooling — Troubleshooting Guide →

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 CF Er CF — Condenser fan motor feedback fault Er CO Er CO — Communication error (main board ↔ display)

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.