pur faucet filter troubleshooting

Water is the most important drink globally, yet it is subject to constant contamination before it arrives on your tap. PUR water filters are meant to help purify your water of impurities, germs, and unhealthy heavy metals that can cause various health problems.

However, just like other machines, these filters sometimes malfunction which is a frustrating problem when you need them the most. This PUR water filter troubleshooting guide will help you solve the 15 common problems with PUR filters.

PUR Water Filter Troubleshooting – 15 common problems with PUR filters

PUR water lines have many mechanisms to help clean your water for your daily needs efficiently. They are known for their capacity to filter over 70 water contaminants, including mercury, lead, and dirt, from your tap water for healthy drinking.

They are suitable for home use since they require very little maintenance apart from regular cleaning and filter change. However, similar to many filters, you may find frequent clogging, leaking, and slow filtration that would need troubleshooting. Let’s identify those problems and how to solve them.

1. Why Is My PUR Water Filter light Blinking Red After Filter Change?

PUR water filters often blink red due to the accumulation of dirt particles in the filter if you have run 100 gallons of water. However, if it blinks red after you have changed the filter, it is a false alarm and can be due to the following reasons.

The new filter may have traces of dirt particles trapped in it, making it false. You can fix it by removing the filter, cleaning it to remove the dirt, and rinsing thoroughly with clean water.

Another reason for the false alarm could be a faulty electrical circuit. You can fix this problem by getting a new electric circuit from a PUR store outlet and consulting a technician to fix it.

The problem may be due to a filter not resetting. This issue is also easy to fix once you identify why the filter is not resetting, depending on the form of your filter.

2. PUR Water Filter Light Not Working

The problem of the light not working could be due to the indicator being on an idle mode, and you could solve the problem by holding the button for a few seconds and then release for the lights to turn on. The reset button is pressed differently depending on the type of filter you have.

To rest a pitcher filter, you will locate the position of the indicator light, usually on top of the pitcher, and next to it is the reset button, press it for a few seconds, and when you release the light will work well.

The PUR FM 3700 faucet filter requires that you disconnect the system from the faucet since the rest button is inside the canister. Press the reset button until it pops out, then fit the filter back and close the lid. Reconnect the system to its original position, and the light will turn green, indicating that the filter is working correctly.

An electric problem could also cause the issue, and you will need to fix the electric circuit for your light to start working again. An electrician may help in sorting out the problem for you.

3. Light Not Automatically Turning Green Upon Filter Replacement Or Installation

After changing the filter or installing and pouring water on a faucet filter or a pitcher, the filter system indicator ought to blink, and the light should then turn green when you are done pouring water. However, sometimes the light won’t turn green as expected and there is a blinking red light after changing the filter instead of a solid green light.

If that is the case, you could try to change the cartridge, though there is no guarantee that the problem is fixed. This problem could also indicate that your filter needs cleaning; therefore, you should remove the filter and then blow hard through it, and this method could the trick. However, if you have a filter mounted on a faucet, you need to turn the cap off, then remove the filter and follow the same procedure as above.

4. PUR Water Filter Leaking

The leakage can happen for several reasons: incorrect installation, hot water passage, filter too loose or tight, filter tilting, incompatible adapter, and debris. It could also result from an ill-fitted O-ring, incorrect water poring method, loose valve, and damaged filter.

This problem is fixed depending on what causes it. For example, incorrect installation is causing it, and then you will have to disengage the entire system and then fix it correctly, ensuring that the screws fit well and that the filter is tightened enough.

If the filter is not tight enough, you will click into place the filter for maximum filtration. You can also remove the filter and reinstall it. Remember when winding it clockwise, do so gently until you hear the click sound.

You can also avoid water leaks by avoiding pouring hot water through the filter since heat can damage the filtering agent, its washers, and cartridge’s filter weaves, causing leakage of unfiltered water.

Additionally, regularly wash the housing area to remove debris that may result in water blockage causing leaks. If the leaver has a problem closing resulting in leaks, you could uninstall the system from the faucet and then carefully reinstall it.

If an incompatible adapter causes the problem, you can request a new compatible adapter that often comes free for an easy fix. Other causes like an ill-fitting O-ring are corrected by getting a new one or correctly fitting it, and a replacement of the faulty valve can stop the leakage.

5. Why Is The PUR Water Filter So Slow?

Slow running of the PUR filter may be due to air blockage, running hot water, incorrect installation, high sediment levels, old filter, or mineral damage. A slow-running filter may cause a longer filtration time than usual.

If the air bubble is trapped in the filter cartridge, you will need to remove the filter from the pur faucet and then remove the air. If the sediments are the problem, clean the filter; sometimes, you may also need to replace the filter if it is overdue to correct the contaminant problem.

Remember that the filter is designed to run cold water only; avoid pouring hot water that could cause irreparable damage.

6. Clogged Filter

Clogging is another problem worth troubleshooting. It happens when debris and sediments block the filter cartridge causing leaks and slow running of the system. To correct this problem, clean the filters after usage to remove the dirt, mold, bacteria, mildew, and debris.

PUR water filter replacement is necessary to solve clogging if the filter has run its course after two or three months. Ensure that you also clean the outside of the filter for hygrine purposes.

7. PUR Water Filter Overflows

An overflow of water can be very annoying, and the problem is often the result of an incorrectly adjusted filter. Therefore, you can correct it by turning the filter anticlockwise if it is too tight to adjust.

8. PUR Water Filter Leaking From Top

Water leak from the top is a sign of an improper installation, and the problem is solved by reinstallation of the filter. Reinstallation is done by removing the filter from the faucet and then reinstalling it. During this process, ensure that the filter cartridge is correctly fitted and tightly and correctly screwed.

9. Why Pur Water Filter Slow Flow?

The low pressure of the filtered water can result from low water pressure from the source water causing low water flow or one of the issues mentioned above. Knowing what causes the problem can help fix it faster rather than waste time experimenting.

10. PUR Water Filter Not Working / Filtering

If manufacturing mistakes do not cause this problem, then it can easily be fixed. Therefore, examine the problem to see if the problem is from your end and not the manufacturers. It often the result of poor installation and light not working.

If the problem is installation, you will need to uninstall the entire system and then slowly and carefully follow the manual for correct installation. On the other hand, if it is caused by the light not working, then you may need to change your filter or correct the electric circuit for proper operation.

11. PUR Water Filter Not Fitting

Since no single filter can fit all faucets properly, the mismatch is likely to happen. If your PUR filter is not fitting, you can find a replacement from your store, and you can get it done for you freely. You could also confirm if you need an adapter and a washer to help you fit the incompatible part.

12. Filtered And Unfiltered Water Comes Out From The Filter

This problem common with pitcher filters is solved by removing the filter, cleaning together with the pitcher, and air drying it.

13. PUR Water Filter Doesn’t Fit The Faucet

Sometimes the filter does not fit the faucet, but it should not be a problem since PUR comes with four distinct adapters that enable you to screw perfectly into any facet type you have in your sink. These adapters often accompany the filter you buy, meaning you can keep trying the adapters until you find the one fitting.

14. Filter’s Adapters Do Not Fit

The faucet threading may fail to match the enclosed adapters perfectly. Before you ask for a refund for the wrong adapter, consider using an adapter kit extension to help you fit your filter to the faucet.

15. PUR Water Filter Passes Black Particles

Though seeing dark particles in your filtered water can be scary, they are harmless. These are active charcoal particles that the filter uses to filter your water that eventually pass to your glass.


PUR water filters are amazing in their ability to remove 99% of contaminants and metals from the water. The installation is often straightforward but there can be installation and filter change problems that can be frustrating. Hopefully this guide helps get you drinking clean amazing water.

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