Error code · Room Air Conditioner

LG Air Conditioner Message Clean Filter: Maintenance Reminder

Low risk · DIY check OK

Code: Clean Filter
Appliance: Room Air Conditioner
Brand: LG
Warranty: 30-day workmanship

What Clean Filter means

Clean Filter is a reminder message on LG air conditioners that show CH codes, and it is mainly seen on ceiling-mounted units with a wired or wireless remote. It is not an error. The message appears based on operating hours and not on how dirty the filter is, and it goes away after about 50 hours of use. It can also be reset on the cable or wireless remote. The owner sees the words on the display and the unit keeps cooling.

Common causes of Clean Filter

Operating-hours reminder that has come due
Reminder not reset after a cleaning

✓ One safe check you can try

1. Slide out the filter and clean it as the instructions show. 2. On a cable remote, reset through the Set Function menu. 3. On a wireless remote, press Cancel Reservation or Set-Release three times. 4. Confirm the message is gone from the display.

! Why to stop there

If the reminder returns right after you reset it, we check the timer memory on the control board.
If airflow stays weak after cleaning, we look at the coil and the blower.
You see the finding before any repair is quoted in writing.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Room Air Conditioner codes

LED Too BrightLG Air Conditioner LED Too Bright: Remote Brightness Control LoLG Air Conditioner Message Lo: Low Room Temperature "Outdoor Unit" MessageLG Air Conditioner "Outdoor Unit" Message: Status Display SP, CP, POLG Air Conditioner Codes SP, CP, PO: Power Cooling Mode F1, F2, F3LG Air Conditioner Codes F1, F2, F3: Fan Speed Readout FLLG Air Conditioner Code FL: Condensate Tank Full HiLG Air Conditioner Message Hi: High Room Temperature Lamp Does Not LightLG Air Conditioner Lamp Off After Shutdown: Filter Alarm Timing

Clean FilterClean Filter questions

Does Clean Filter mean the filter is dirty?

Not necessarily. The reminder is triggered by operating hours, regardless of how the filter looks. It is still a good moment to wash the filter, which helps airflow and cooling.

How do I clear the message?

Clean the filter, then use the reset on your remote. On a cable remote it is in the Set Function menu, and on a wireless remote you press Cancel Reservation or Set-Release three times.

Will it go away by itself?

Yes. After about 50 hours of use the message disappears on its own, but resetting it right after you clean the filter is the tidier way to handle it.

Book a visit

Still unsure about Clean Filter?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 597-5662