If you use a PUR water filter pitcher or faucet system, you’ve probably noticed the small LED indicator lights on the unit. These lights are more than just decorative—they’re designed to let you know when your filter is working properly and when it’s time for a replacement. Understanding what each light means can help you keep your water clean and your system running smoothly.
What the PUR Indicator Lights Mean
Most PUR water filtration systems use a color-coded light system: green, yellow, and red.
- 🟢 Green Light – Filter is Good
A green light means your filter is working properly and doesn’t need to be changed yet. Your water is being filtered as expected. - 🟡 Yellow Light – Time to Change Soon
When the light turns yellow, it’s a warning that your filter is approaching the end of its lifespan. It’s still filtering water, but you should have a new filter ready to replace it soon. - 🔴 Red Light – Replace Filter Now
A red light means your filter is no longer effective. It has reached its maximum usage limit, and it’s time to replace it immediately to ensure you’re getting clean, safe water.
How the Indicator Works
The PUR filter light is typically timer-based, not sensor-based. This means it tracks the passage of time or the number of gallons filtered, depending on the model—not the actual quality of the water. For pitchers, the system often counts days, while faucet-mounted filters may track usage through flow detection.
Troubleshooting PUR Filter Indicator Issues
Sometimes, the indicator lights may not work correctly or may need to be reset. Here are some common problems and solutions:
- Light Not Turning On After Filter Replacement
– Make sure the filter is installed correctly and fully seated.
– For pitchers: Press and hold the reset button (usually on the lid) for 5 seconds until the green light flashes.
– For faucet filters: Hold the reset button or follow the manual’s instructions after installing a new filter. - Light Stuck on Red or Yellow After Replacing Filter
– Try resetting the light by holding down the reset button for 5–10 seconds.
– If the light doesn’t change, check the battery (some models have a small battery for the light system). It might need replacing. - Lights Not Working at All
– Ensure the filter unit is dry when replacing the battery (if applicable).
– If it’s a pitcher and you’ve replaced the filter and reset the button, but still see no light, the indicator may be defective. You can still use the filter, but track changes manually (about every 40 gallons or 2 months for pitchers). - Lights Flash Incorrectly
– Remove and reinstall the filter.
– Clean any buildup or residue around the filter housing.
– Reset the unit as described in the manual.
Final Tips
- Always use genuine PUR replacement filters to ensure the indicator system functions correctly.
- Keep track of the date you install a new filter in case the indicator malfunctions.
- Store replacement filters in a cool, dry place and rinse them before use, as recommended.
In Summary
The PUR indicator light system is a helpful tool to keep your water clean and safe. Green means you’re good, yellow means get ready to change the filter, and red means it’s time for a new one. If the light isn’t working right, a quick reset or battery check usually solves the issue. Regular maintenance and timely filter changes will ensure your PUR system works effectively for the long run.