Freezer Fan Error

What it means

This code appears on LG refrigerators with a digital display and means the main board is not getting a proper running signal from the freezer fan that circulates cold air. The most common cause is ice building up around the fan so it cannot turn, or a failed fan motor. Freezer cooling weakens, and on many models the fresh food section warms too; the same code can mean something else on other brands.

Models covered: LG refrigerators with a digital display (e.g. side-by-side, French door and top-freezer models); the code shows as Er plus two letters.

Related codes: ER DHER DSER FSER CF

Symptoms5

• Er FF shows on the refrigerator display.
• Weak freezer cooling and partly thawed frozen food.
• Scraping or clicking from inside the freezer, or the usual fan sound is missing.
• Frost building up on the back wall inside the freezer.
• The fresh food section gets warmer than usual on many models.

Possible causes5

• Ice around the freezer fan blades because the door is left open or does not seal.
• A defrost system fault that lets the fan freeze in.
• Failed freezer fan motor.
• Loose fan connector or broken wiring.
• A fault in the fan circuit on the main board.

How to diagnose5

1. Check that the freezer door closes fully, the gasket is intact, and no food blocks the door or the air vents.
2. Unplug the refrigerator for a few minutes and plug it back in; if the code returns, the fault is real.
3. Listen for the fan inside the freezer once the compressor runs; silence or scraping points to ice or the motor.
4. A technician unplugs the refrigerator before removing the inner cover and checks for ice around the fan and whether it turns freely.
5. The technician checks the fan connector and wiring, compares the supply and signal with the manufacturer specification, and checks the defrost system if ice is found.

How to fix6

1. Fix whatever keeps the door open, or replace a damaged door gasket.
2. The technician melts the ice around the fan and repairs the defrost fault if there is one.
3. Repair the fan connector or wiring.
4. Replace the freezer fan motor if it is proven faulty.
5. Replace the main board only after the fan and wiring are confirmed good.
6. Run the refrigerator and confirm normal cooling and fan operation without the code returning.

The cost is low for ice buildup or a loose connector, moderate for a new freezer fan or a defrost repair, and higher only if the main board is at fault.

Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Prices last updated: September 2026

Frequently asked questions