LG · Refrigerator
LG Refrigerator FF Error Code
Freezer evaporator fan fault
What this error means
FF signals the freezer evaporator fan did not provide feedback while running. This fan circulates cold air from the evaporator coil to both freezer and fresh food sections—warm spots and soft ice cream often appear before the code.
How FF is detected
When FF appears on a LG refrigerator, the control board has confirmed that water did not leave the machine within the programmed drain window. On LG LFXS26596S, LG LRFVS3006S, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most FF calls are resolved without parts: manual defrost: unplug, empty freezer, open doors 8+ hours. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If FF returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Heavy frost locking the fan blade
- Burned-out BLDC evaporator motor after years of run time
- Failed defrost heater letting coil ice over
- Loose fan connector behind the freezer rear panel
Step-by-step fixes
- 1Manual defrost: unplug, empty freezer, open doors 8+ hours
- 2Remove freezer rear panel after thaw and spin the fan blade—it should move freely
- 3Clear drain pan ice if defrost water backed up
- 4Reinstall panel and monitor for 24 hours before reloading food
When to call a technician
Free fan blade with no motor hum after defrost requires evaporator fan motor replacement.
Affected models
- LG LFXS26596S
- LG LRFVS3006S
- LG LFXC22526S
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use refrigerators to prevent FF from lint and food debris buildup.
- Record when FF appears in the cycle and whether it clears after a 60-second power reset on your LG refrigerator—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for FF; LG uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting FF; reversed plugs on pumps and valves cause immediate repeat faults.