FixByModel
F0

LG F0: Lint filter not inserted properly

The dryer signals that the lint filter is missing or not seated all the way in its housing. Reinserting a clean filter fully usually clears it.

DIY fix

By the FixByModel editorial team · Verified 2026-09 · Researched against manufacturer support & repair references (below)

Most likely causes

  1. Lint filter not pushed completely into its slot
  2. Filter left out after cleaning
  3. Heavily clogged lint screen restricting airflow
  4. Debris in the filter housing blocking full insertion
The airflow path — check in this order
1Lint filter
2Blower / lint housing
3Vent hose
4Wall duct
5Exterior vent

Schematic illustration of a typical dryer — not your exact model.

Before you start — unplug the dryer, and on a gas model shut off the gas supply. Let it cool first — the drum, heater and exhaust can be hot. If a step involves the heating element, wiring, or opening the cabinet and you're unsure, stop and call a qualified technician.

Step-by-step fix

1Remove and clean the filterPull out the lint filter and clear all lint from the screen so airflow is not restricted.
2Clear the housingCheck the filter slot for stray lint or debris that could stop the filter from seating fully.
3Reinsert fullySlide the filter all the way down into its housing until it is firmly seated.
4Restart the cycleClose the door, select a cycle, and press start; the F0 message should clear.
5Power reset if neededIf F0 remains with the filter properly installed, cycle power at the breaker for about 10 seconds and retest.

Still showing F0?

If you’ve worked through every step and F0 keeps returning, an internal part likely needs testing and replacement. That’s a job for a qualified appliance technician, who can measure the suspect part against the service-manual spec before replacing it.

Which models this applies to

LG dryers. LG dryers that detect lint-filter position; sometimes shown as FO.

FAQ

What does LG F0 mean?

Lint filter not inserted properly. The dryer signals that the lint filter is missing or not seated all the way in its housing. Reinserting a clean filter fully usually clears it.

What causes LG F0?

The most likely cause is lint filter not pushed completely into its slot. Other causes include Filter left out after cleaning; Heavily clogged lint screen restricting airflow; Debris in the filter housing blocking full insertion.

Can I fix LG F0 myself?

Usually yes. Start by working through the steps above, beginning with: pull out the lint filter and clear all lint from the screen so airflow is not restricted.