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Why is My PUR Water Filter Light Not Working?

Scott Winfield
Written by Scott Winfield
Last Updated on

PUR is a company that makes faucet filters, pitcher filters, and water dispensers. All of these units have their own filtration system and a filter indicator light that tells you when it’s time to change the filter.

However, sometimes, the indicator light might not work properly or at all. There are several reasons why this might happen, so we’ll go over each and share solutions for fixing the issue.

PUR Water Pitcher Filter

What Can Cause Problems With the PUR Filter Light?

The filter light in PUR filters should flash a certain color once the water flows through the system – unless the device is in sleep mode. Depending on the condition of the filter, the light should flash green, yellow, or red.

Green means that the filter is in good condition and doesn’t need to be replaced. Yellow means the filter is still working properly, but it needs to be replaced soon. Red means the filter isn’t effective anymore and needs to be replaced immediately. This is because the red light indicates that the filler is not purifying the water.

Replacing the filter should be enough for the indicator light to flash green again.

PUR Water Faucet
PUR Water Faucet

However, if the light isn’t working or doesn’t flash green even after changing the filter, you’re probably dealing with one of the following issues:

  1. Dead batteries
  2. Stuck reset Button
  3. Loose filter

Dead Batteries

The PUR water pitchers and dispensers need to be connected to a power outlet, so the batteries can be charged. Once fully charged, you should be able to get by for a few days on the batteries. But if the filter light isn’t working, charging your device is the first step you should try.

The faucet filters, on the other hand, come with non-rechargeable batteries. On the plus side, this means that you don’t need to charge the faucet filters. However, on the downside, these batteries only last around 2-3 years, after which they die.

The filter will still work, but without a filter indicator light, you’ll need to manually calculate how many gallons per day you use so you can estimate when you should replace the filter.

Unfortunately, there’s no way to charge the batteries on a faucet filter, so once the light dies, there’s nothing you can do but buy a new one or manually keep track of the filter’s lifespan.

Reset Button

This issue is unique to the faucet filtration units.

The filter reset button is a thin rectangular button that’s located on the inside of the filter’s casing. The button is always pushed down when the filter is in the casing, and when you remove the filter, the button is pushed up.

Once a new filter is placed, the reset button is pushed down again. This is the method with which the system registers that a new filter has been put in.

If the light isn’t working or it’s flashing red even after placing a brand new filter, then the reset button might be stuck and fails to register the filter.

In order to fix this issue, all you need to do is open the casing, remove the filter, and locate the reset button on the side. Use your finger or something thin to gently push the reset button down and up several times.

After that, put the new filter in, close the casing, and place the unit back on your faucet. Try it out to make sure the filter is working properly and that the light is flashing green.

Loose Filter

If the filter isn’t secured correctly, the device will fail to register that there’s a filter placed in. Since it doesn’t register a filter, there’s no need for a filter warning light – you won’t see any colors flashing.

A loose filter is an issue that can happen to any PUR unit. Luckily, the solution is incredibly simple.

Open the filter casing, take out the filter, re-insert it, and ensure it’s properly secured within the casing.


The filter warning light will not work correctly if the battery is low, the reset button is stuck, or the filter isn’t inserted properly.

All you need to do to ensure your filter light is working is to charge your pitcher or dispenser, de-stick your reset button, and make sure the filter is in place.

The only issue that you can’t solve is a dead battery on a faucet filtration unit since, in that case, you’ll have to buy a new unit entirely.

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Scott Winfield
Scott Winfield
My name is Scott Winfield and researching and writing about water filters and other strategies to purify water has become my full time passion in recent years. I'm glad that you found our site and you can look forward to authoritative and well researched content here to help you get the best in water.
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