How does a refrigerator know when to change the filter?

Author: Madisyn Kshlerin Sr.  |  Last update: Monday, August 25, 2025

Many refrigerators with a water filter have a "replace filter" indicator light for the water filter cartridge on the dispenser control panel. This is often a timed function rather than a sensor that determines the filter's capacity. Some refrigerator models use a water filter with a RFID chip in the filter.

How does an LG fridge know when to change the filter?

Your refrigerator has sensors that detect flow, of both water, and air. So after a set amount of time, and flow has passed, the computer responds to the inputs of the sensors, and makes the decision to turn on the light indication the need to replace the required filter/s.

How often do you really need to change your refrigerator water filter?

Refrigerator water filters are one of the best, most cost-effective ways to ensure your family is drinking clean, fresh-tasting water, but they need to be changed every six months. After six months, three things can start happening: Your filter becomes easily susceptible to becoming saturated with contaminants.

What happens if I don't replace the water filter in my refrigerator?

Failing to change your refrigerator water filter regularly can lead to several issues: Reduced Water Quality: Over time, filters become clogged with contaminants, which can lead to water that tastes or smells bad. They may also fail to effectively remove impurities such as chlorine, lead, and bacteria.

Why does my fridge still say replace filter after I replaced it?

The light on the fridge is not actually connected to the filter; it works on a 6-month time frame; so when you change the filter, the light may remain on.

When Should You Replace Your Refrigerator Water Filter? And Why It's So Important

How does my refrigerator know when to change filter?

If you have a touchscreen refrigerator with a filter indicator light, simply change the filter when the light flashes. This will keep your ice and water tasting great. Signs it's time for refrigerator water filter replacement include: Water coming from the fridge dispenser tastes or smells bad.

Can you drink water from fridge if it says replace filter?

Ignoring the need for regular refrigerator water filter changes can lead to a host of problems. From a health perspective, an old or clogged filter cannot effectively remove contaminants. This situation means you might drink and cook with unfiltered water, exposing you and your family to potential health risks.

Will the ice maker work without a filter?

The short answer is not necessarily.

An ice machine will operate without a filter, but will quickly start having problems will scale buildup, especially in a city where the water is considered “hard”.

Is it OK to use off brand refrigerator water filters?

Consumer Reports have shown that while some off-brand filters can perform reasonably well, brand name filters consistently outperform their generic counterparts in both filter quality and water purity.

Can I bypass my refrigerator water filter?

Many refrigerators have built-in water filtration that filters sediment and contaminants from the water going to the dispenser and/or the icemaker. If you do not need or want to use the water filter, a bypass plug must be used in place of the filter.

How do I know when my water filter needs replacing?

So we've put together a simple guide for you to tell whether this might apply to your cooler or water filter system.
  1. 1 - Reduced Delivery Volume. ...
  2. 2 - Water Tastes or Smells Bad. ...
  3. 3 - Strange Noises or Air Bubbles. ...
  4. 4 - Discoloured or Cloudy Water. ...
  5. 5 - Expiry Date or Visual Indicators.

Do I need to dump ice after changing the water filter?

Discard the ice cubes produced during the first 24 hours. If your appliance has a water dispenser, dispense water for 5 minutes and then discard.

Do you have to turn off water to change water filter in refrigerator?

Do You Have to Turn the Water Off to Change a Refrigerator Filter? You do not have to shut off the water supply from your refrigerator to change out an old water filter.

How long do refrigerator water filters really last?

Refrigerator filters should be replaced every 6 months. Never leave a filter in place longer than a year. The longer you use a carbon filter beyond its maximum capacity, the more harmful your water could become.

What temperature should a refrigerator be?

To ensure that your refrigerator is doing its job, it's important to keep its temperature at 40 °F or below; the freezer should be at 0 °F.

How to tell if a refrigerator water filter is working?

Change Indicator Light: Some refrigerators have a built-in reminder that lights up when your filter is ready to be swapped. Weird Taste or Smell: Notice your water or ice doesn't taste as fresh or has a funky smell? That's a clear sign the filter's no longer doing its job.

What happens if you don t change water filter in refrigerator?

An unchanged water filter can produce water with a foul odour or a strange taste. A dirty or clogged water filter can also affect the mechanical actions within your refrigerator, such as the Ice dispenser. A refrigerator with a water dispensing function is a significant investment and really should be treated as such.

What is the best brand of water filters for refrigerators?

The Best Refrigerator Water Filters Buyer's Guide & Reviews
  • Waterdrop Advanced ‎WD-F07. Best for Whirlpool and Maytag. ...
  • Culligan IC-EZ-1. Best Inline Refrigerator Water Filter. ...
  • PureLine Refrigerator Replacement Water Filter. Best GE MWF and Kenmore. ...
  • Waterdrop Advanced WD-F32. ...
  • EcoAqua Refrigerator Water Filter.

Can you throw away refrigerator water filters?

Answer: Water filter recycling varies by municipality. Refer to the local recycling facility for specific information on items accepted for recycling. While not recommended, it is safe to throw water filters in the trash.

Will a fridge stop making ice if the filter is bad?

Filter Clogs

Anything that regulates water flows to the ice maker can stop it from creating ice, especially if it becomes clogged.

Do you really need a refrigerator water filter?

The short answer is that fridge water filters do work for some simple needs — mainly those related to chlorine, like unpleasant tastes and odors. However, the list of things a refrigerator filter can't do is far longer. For example, fridge systems won't reduce contaminants like arsenic, pharmaceuticals and fluoride.

Does the ice maker stop when the filter is dirty?

This ultimately results in an ice machine shutting down into its fail-safe mode until the water filter is clear and water can flow back to the machine.

Do I need to unplug fridge before changing water filter?

The steps to replacing a twist-in filter are as follows: Unplug the refrigerator. This may seem like an obvious step, but you should always turn off the power to any electrical appliance before working on it.

Is sink water the same as fridge water?

If your fridge has a built-in filter, the water is not pure tap water, but it's still sourced from your tap. This means that the refrigerator draws the water from the tap, but puts it through a filtration or softening system. As a result, when it exits your refrigerator, it is no longer technically tap water.

How often should I replace my refrigerator?

Most refrigerators are designed to last between 10 and 20 years. If you're having any other problems on this list and the fridge is over ten years old, you'll probably save more money in the long run by simply replacing it. Otherwise, you could sink money into repairs for a fridge already on its way out.

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