Step-by-Step DIY Fix Guide
- SAFETY: Unplug the refrigerator before starting any thawing or fan-area checks.
- Check that the freezer door is closing fully and the gasket grips evenly all the way around.
- Move food to a cooler and leave the refrigerator unplugged long enough for a full manual defrost if heavy frost is likely.
- After thawing, restore power and listen for the freezer fan to start once the refrigerator begins cooling again.
- If FF returns after a complete thaw, stop at that point and arrange service rather than forcing repeated resets.
If FF comes back after a complete thaw
- If cooling improves briefly and then drops again, frost may be rebuilding around the fan.
- If you never hear the fan restart after thawing, the motor or wiring is more likely than a simple ice blockage.
- If the gasket is leaking, fix that before assuming the fan motor is the only failed part.
What This Error Means
LG refrigerator error FF means the freezer evaporator fan is not operating normally. That fan is responsible for moving cold air across the freezer and into the fresh-food section, so a fan problem can make both compartments warm unevenly.
The most common first cause is still frost buildup around the fan blade. A weak door seal or repeated warm-air entry can let enough ice build up to stop the fan from turning.
If a full manual defrost clears the warning only briefly, the next likely issue is the fan motor itself or the wiring to it.
Most Likely Cause by Symptom
The freezer is warming and the fresh-food section is also less cold than usual.
Likely cause: Cold air is not circulating because the freezer fan is not running normally.
Check first: Check for gasket leaks and likely frost buildup before assuming the fan motor has failed.
The code clears after a thaw, then returns later.
Likely cause: Frost is rebuilding around the fan or the motor is failing intermittently.
Check first: Monitor door sealing and listen for the fan after restart before ordering parts.
Common Causes
- Ice buildup has frozen the freezer fan blade in place.
- A poor door seal is letting humid air into the freezer and creating frost around the fan.
- The evaporator fan motor has failed and no longer spins.
- Wiring or a connector to the fan motor is damaged or loose.
- Ice maker overflow or a defrost issue has allowed ice to build around the fan housing.
What Not to Do
- Do not chip ice away around the fan housing with sharp tools.
- Do not keep power-cycling the refrigerator if temperatures are rising and FF keeps returning.
- Do not assume the main control board is the first failed part before the frost and fan path are checked.
Model and Display Variation Notes
Model-family notes
- LG freezer-fan access and evaporator layouts vary by refrigerator family, but FF still points first to the freezer fan path.
- A freezer fan fault often affects fresh-food temperatures too, so compare both compartments rather than checking only the freezer.
Display and panel differences
- Panel wording can vary by series, so confirm the exact code pattern before buying parts.
Parts, Tools and Service Options
Common parts
- Evaporator fan motor if motor has failed ($20–$60)
Manual and model check
Check your exact model and manual before ordering any LG refrigerator parts.
Service option
Service visit if FF returns after a full defrost and restart.
Suggestions in this section are organized to support the troubleshooting flow first. Any future affiliate relationships should be disclosed clearly.
When Not to Keep Troubleshooting
FF returns after a complete manual defrost.
- The fan does not restart after thawing is complete.
- The refrigerator is warming enough to raise food-safety concerns.
How to Prevent It Recurring
- Inspect the freezer door gasket every 6 months — a leaking gasket is the primary cause of fan ice build-up and repeated FF errors
Related Error Codes
dH
LG refrigerator error dH usually means the automatic defrost cycle is not clearing frost from the evaporator in the expected time.
dS
The defrost sensor (thermistor that monitors evaporator temperature during the defrost cycle) has either shorted or become disconnected. Without a valid sensor reading, the control board cannot safely manage the defrost cycle.
CF
LG refrigerator error CF usually means the rear condenser fan is not spinning normally or the control cannot confirm that it is running.
Extra notes
- This page is based on LG support material and stays conservative where model-specific guidance may vary.
- The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.
Source and model notes
Last reviewed: 2026-04-08
Based on: Based on LG refrigerator freezer-fan fault guidance and edited to help users separate an ice-bound fan from true motor failure.
Model coverage note: Fan housing access and defrost behavior vary by LG refrigerator family, so use this page as a safe first-pass guide rather than a model-specific teardown procedure.
Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.
Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.