LG Dryer Check Filter Light
LG's US list files this display under the heading “Clean filter” — the check filter indicator. Same reminder, two labels.
What to check first
- It is a reminder, not a fault: clean the lint filter before each use (LG US).
- It turns off when you select a program or press Start/Pause — that is the design.
- Coated filter? Warm water and a soft brush, dried fully (LG UK's method).
- Flashing INSERT FILTER / FO is a different display — see the FO page.
The Check Filter indicator is the most misread display on an LG dryer, because it looks like a fault and is not one. LG's US list defines it in full: the check filter indicator is a reminder to clean the lint filter before each use, to ensure effective drying every time — and it gives the clearing rule owners actually ask for: the indicator turns off when you turn the cycle knob to select a drying program, or when the Start/Pause button is pressed. If yours is lit before a cycle, that is the design. Clean the filter, select your program, and the light does its job and goes out.
Safety first
- A clean filter is a safety item, not housekeeping: lint is what restricts the exhaust behind the <a href="/lg-dryer-error-codes/d95/">d95</a> end of the Flow Sense scale. The reminder exists because the habit matters.
- Stop condition: stop using the machine and unplug it — and do not run it again until it has been checked — if you smell burning, see smoke, find damaged electrics (a scorched plug, a melted or cut cable), or water is leaking in quantity.
Common causes
It is lit because it is supposed to be
LG designed the indicator as a before-each-use reminder. It is not detecting a failure; it is prompting the habit — clean the lint filter before each use, for effective drying every time (LG US).
A filter that needs more than a wipe
If drying has slowed while the reminder does its rounds, the filter itself may be coated rather than merely linty. LG's cleaning method (from its UK list): clean the lint tray with warm water and a soft brush, then allow it to dry before reinstalling.
Step-by-step checks
- Clean the lint filterPull the filter out, roll the lint off it, and refit it. For a coated filter, LG's method is warm water and a soft brush, dried fully before it goes back.
- Select a program — the indicator turns offLG's US rule: the indicator turns off when you turn the cycle knob to select a drying program, or when the Start/Pause button is pressed. A light that behaves this way is behaving normally.
- If the display is FO or INSERT FILTER instead, go thereA flashing INSERT FILTER — or FO/F0 — is a different display with a different meaning: the filter is out or unseated and the dryer stops. That is the FO page.
When to call a technician
There is no technician case for the Check Filter reminder itself — it is a prompt, not a fault, and LG publishes no repair path for it. Service enters through the neighbouring displays: FO if the filter will not seat, or a d code if drying times have stretched and the vent path needs the checks on the d80 page.
Model differences
| What you have | What changes |
|---|---|
| Label reads “Clean Filter” | The same reminder: LG's US list heads the section “Clean filter” and describes the check filter indicator. One display, two labels. |
| Light on before every cycle | Normal — that is the reminder doing its job. It turns off at program selection or Start/Pause (LG US). |
One-page checklist — Check Filter
- Indicator recognised as a reminder, not a fault
- Lint filter cleaned (and washed, if coated) before the load
- Indicator clears on program selection / Start-Pause — confirmed normal
- FO or INSERT FILTER flashing instead → FO page
Official LG references
Frequently asked questions
Why won't the Check Filter light turn off?
Per LG's US list, it turns off when you turn the cycle knob to select a drying program or press Start/Pause — it is not meant to clear while the machine sits idle after a cycle. If it is lit before you start, clean the filter, select the program, and it should clear at that point.
Is Check Filter an error code?
No. LG files it among its dryer display explanations as a reminder to clean the lint filter before each use. The dryer runs normally with it lit; it carries no repair path because there is nothing to repair.
Check Filter vs FO — which do I have?
Check Filter is a steady reminder light and the dryer runs. FO (or F0, or a flashing INSERT FILTER) means the filter is out or unseated — and the dryer stops. If the machine will not run, you are on the FO page, not this one.