LG Dryer IF — Interior filter assembly fault
LG Dryer · Error code IF
What IF Means
IF indicates the interior (secondary) lint filter assembly is missing, improperly seated, or the magnet that confirms its position is missing. The dryer will not run because operating without the filter allows lint into the heat exchanger.
Symptoms
- IF on display
- Dryer will not start
- Recently cleaned or removed inner filter
Common Causes
Filter not pushed in completely after cleaning.
Orientation arrow not aligned per manual.
Magnet in the filter housing has come loose.
Sensor in the cabinet does not detect the magnet.
How to Fix It
- Remove the interior filter, inspect for damage, and reinstall fully in the correct orientation.
- Confirm the filter clicks into place; if not, look for missing or broken retention tabs.
- Look for a small magnet embedded in the filter frame — if missing, replace the filter.
- If a known-good filter is installed correctly and IF persists, unplug and access the position sensor in the filter cavity; test continuity with the magnet present/absent.
- Replace the sensor if it does not switch states.
- Reassemble and verify the dryer starts a normal cycle.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More LG Dryer Codes
Verified against manufacturer documentation: lg.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.