How to Reset Water Filter on LG Refrigerator (Any Model)

Quick answer: How to reset water filter on LG refrigerator: press and hold the Water Filter or Filter Reset button for 3 seconds, until you hear a chime or the indicator turns off. On some models that key is labeled Express Freeze, Ice Plus or Express Frz. If nothing happens, the control lock is on or the filter timer hasn’t run out yet.

The reset itself takes three seconds. What trips people up is the button, because LG puts it on different keys depending on the model, and a few fridges flatly refuse to reset early.

So I’d work through it in order. Try the hold first. Then check the reasons it might ignore you.

How to Reset Water Filter on LG Refrigerator: The Basic Hold

LG’s own help library gives the standard method:

1. Install the new cartridge first. The indicator is meant to be cleared after a replacement, not before.
2. Find the Water Filter or Filter Reset key on the control panel. On many models it shares a button with Express Freeze, Ice Plus or Express Frz.
3. Press and hold it for 3 seconds.
4. Listen for a chime or watch the icon go dark. Either one means it worked.

LG’s Canadian support page adds that some models need 3 to 5 seconds. It also says to press the dead center of the label, because soft membrane buttons won’t register an off-center touch.

My advice? Count slowly. When I read through LG’s support pages, the same two details kept coming up: hold long enough, and press the middle of the label.

Why the LG Filter Light Won’t Reset

If the hold does nothing, one of these is usually behind it. I’ve ordered them from most to least likely.

1. The control panel is locked. LG says the indicator can’t be reset while the panel is locked. Look for a lock icon on the display.
2. You pressed the wrong key. The reset often lives on a shared button, so the words “Water Filter” may be small print under another function.
3. The timer hasn’t reached zero. On some LG models, the reset only works once the filter status counts down to zero. LG’s page says some can only be reset every 6 months.
4. Your model resets through the app. Some newer LG fridges handle this in the LG ThinQ app.

How to Fix Each Cause

What you see	Likely cause	Fix
Lock icon on the display	Control lock is on	Hold the lock button for 3 seconds, then retry
No chime, light stays on	Wrong key or off-center press	Find the small “Water Filter” label and press its center
Changed the cartridge early	Timer not at zero yet	Wait for the countdown; this is normal
No reset key at all	App-based model	Use LG ThinQ (see below)

For app-based models, open the fridge in LG ThinQ, go to Useful Features, then Filter Management, and tap Filter Reset. Menu names can vary, so don’t panic if yours reads a little differently.

One thing I wouldn’t do is start unplugging the fridge to force it. LG doesn’t list that as a fix for this problem, and the manual or LG support is a better next stop.

What to Do Right After the Reset

Clearing the light is only half the job. The fresh cartridge still needs a flush.

LG says to run about 2.5 gallons (9.5 liters) through the dispenser after installing a new filter. Another option LG gives: dispense for 30 seconds, pause for 60 seconds, and repeat for a total of 5 minutes.

Black specks in the first few glasses? LG calls these carbon fines, and they clear with flushing. Air bubbles or an odd taste usually mean you need more flushing, or the cartridge isn’t fully locked.

How Often Should You Reset It?

Every time you swap the cartridge. LG recommends a new one about every 6 months, or sooner if water comes out slowly or the replacement indicator lights up. Heavy use and poor local water can shorten that.

Keep in mind the light runs on a clock. It doesn’t test your water. If you’re wondering whether an old cartridge can be rinsed and reused, I cover that in how to clean water filter in fridge.

When to Call a Technician

Call LG support or a technician if:

• the panel is unlocked, the cartridge is new, the timer has run out, and the light still won’t clear
• no button on the control panel responds
• water leaks from the housing even though the cartridge is fully locked in

A control board fault isn’t a DIY job. Own another brand? Our guides on the Samsung fridge filter reset and the Whirlpool fridge filter reset cover their sequences, and there’s more in our water filters and softeners section.

Frequently Asked Questions

Where is the filter reset button on an LG refrigerator?

It’s on the control panel, either on the door display or inside the fresh food section. On many models the reset shares a key with Express Freeze, Ice Plus or Express Frz, so read the small label under each one.

Why won’t my LG water filter light reset?

The usual reasons are a locked panel and a timer that hasn’t reached zero. LG says some models only allow a reset once the status counts down, which can mean every 6 months.

How long do you hold the LG water filter reset button?

Hold it for 3 seconds. LG’s Canadian support page says some models may need 3 to 5 seconds, pressed at the center of the label.

Do I have to reset the LG filter light after changing the filter?

Yes. The reminder is a timer and has no idea you replaced anything. Reset it after every change so the next reminder lands on time.

Last updated: November 10, 2026. Sources: LG: how to replace the water filter in your LG refrigerator and LG Canada: reset water filter indicator light.