How to Change the Filter on Your Keurig

Quick answer

• Always use a fresh Keurig water filter.
• Change it every 2 months or 100 brews.
• Locate the water reservoir.
• Remove the old filter cartridge.
• Insert the new filter correctly.
• Soak the new filter before use.
• Run a rinse cycle after installation.

Who this is for

• Keurig owners who want better-tasting coffee.
• Anyone noticing a decline in their Keurig’s performance.
• Folks who want to extend the life of their coffee maker.

What to check first

Brewer type and filter type

Your Keurig model dictates the filter size and type. Most use the standard charcoal filter. Some newer models might have different systems. Always check your manual if you’re unsure. A generic filter won’t fit or work right.

Water quality and temperature

Tap water can be full of minerals and chlorine. These mess with coffee flavor. Using filtered water is a game-changer. The brew temperature is usually set by the machine, but ensure it’s heating up properly. Cold coffee is nobody’s friend.

Grind size and coffee freshness

This guide is about the water filter, but good coffee matters. Use whole beans and grind them just before brewing. A medium grind usually works best for most Keurigs. Stale coffee tastes flat, no matter how clean your water is.

Coffee-to-water ratio

Keurigs are pre-portioned, so this is less about ratio and more about pod choice. Stick to reputable brands. Overfilling or underfilling isn’t an issue here.

Cleanliness/descale status

A dirty machine makes dirty coffee. If you haven’t descaled in a while, do that first. Mineral buildup affects water flow and taste. A clean brewer is the foundation for good coffee.

Step-by-step (brew workflow)

1. Locate the Water Reservoir: Find the removable tank on the side or back of your Keurig.

• Good looks like: The reservoir is clearly visible and accessible.
• Common mistake: Trying to access the filter without removing the reservoir. Just pull it off.

2. Remove the Reservoir: Gently lift the water reservoir straight up and off the base.

• Good looks like: The reservoir comes off smoothly without force.
• Common mistake: Forcing the reservoir. If it’s stuck, check for any latches or clips.

3. Empty the Reservoir: Pour out any remaining water.

• Good looks like: The reservoir is completely empty.
• Common mistake: Leaving water in. This makes changing the filter messy.

4. Locate the Filter Holder: Inside the reservoir, you’ll see a plastic holder for the filter cartridge.

• Good looks like: The holder is easy to spot at the bottom of the reservoir.
• Common mistake: Mistaking the reservoir’s spout for the filter holder.

5. Remove the Old Filter: Pull the old filter cartridge out of its holder. It might have a little resistance.

• Good looks like: The old filter comes out cleanly.
• Common mistake: Leaving the old filter in place. This is the whole point, right?

6. Prepare the New Filter: Unwrap your new Keurig water filter. Most require soaking. Follow the instructions on the filter packaging. Usually, it’s a 5-minute soak in cold water.

• Good looks like: The filter is fully submerged and soaking as directed.
• Common mistake: Skipping the soak. This can release loose charcoal particles into your brew.

7. Insert the New Filter: Place the soaked filter into the holder. Make sure it snaps or clicks into place securely.

• Good looks like: The filter is seated firmly and doesn’t wiggle.
• Common mistake: Not seating the filter properly. It needs a good connection to work.

8. Replace the Reservoir: Put the water reservoir back onto the Keurig base. Ensure it’s seated correctly.

• Good looks like: The reservoir sits flush and secure.
• Common mistake: Not pushing the reservoir down all the way. This can cause leaks.

9. Fill with Fresh Water: Fill the reservoir with fresh, cold water.

• Good looks like: The reservoir is filled to the desired level with clean water.
• Common mistake: Using hot water. Always use cold for brewing.

10. Run a Rinse Cycle: Place a mug on the drip tray and run a brew cycle without a coffee pod. Discard the hot water.

• Good looks like: The machine brews a full mug of water.
• Common mistake: Skipping the rinse cycle. This flushes out any initial charcoal dust.

11. Brew Your Coffee: Now you’re ready to brew your favorite coffee.

• Good looks like: Your coffee brews normally and tastes great.
• Common mistake: Assuming the problem is fixed without brewing. Test it out!

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Using an old, clogged filter	Bitter, stale-tasting coffee; reduced water flow; machine works harder.	Replace the filter every 2 months or 100 brews.
Skipping the filter soak	Fine charcoal particles in your coffee; potential cloudiness.	Always soak the new filter as per package instructions.
Not seating the filter correctly	Water bypasses the filter, negating its purpose; potential leaks.	Ensure the filter snaps or clicks firmly into the holder.
Using tap water without a filter	Minerals and chlorine affect coffee flavor; can lead to scale buildup.	Use filtered or bottled water, or change your Keurig filter regularly.
Forcing the water reservoir off/on	Can damage the reservoir or the machine connection points.	Lift and place reservoirs gently; check for any obstructions or latches.
Not running a rinse cycle after install	First few cups might have a slightly chalky taste from residual charcoal dust.	Always run at least one full brew cycle with plain water after installing a new filter.
Using the wrong size or type of filter	Won’t fit properly, won’t filter effectively, or could damage the machine.	Always verify your Keurig model and use the correct filter type. Check your manual if unsure.
Not descaling regularly	Affects water flow, brew temperature, and can introduce metallic tastes.	Descale your Keurig every 3-6 months, or more often if you have hard water.
Using stale coffee beans	No amount of filter cleaning will fix the flavor of old coffee.	Buy fresh, whole beans and grind them just before brewing.
Ignoring strange noises or slow brewing	Could indicate a serious internal issue, like a clogged pump or heating element.	Address performance issues promptly; consult your manual or customer support if problems persist.

Decision rules (simple if/then)

• If your coffee tastes dull or off, then check your water filter first because it’s the easiest fix.
• If you haven’t changed your filter in over two months, then change it now because it’s likely past its prime.
• If you see white, chalky residue in your water reservoir, then descale your machine because mineral buildup is happening.
• If your Keurig is brewing slower than usual, then check the water filter and descale status because a clog could be the cause.
• If you notice a chlorine or chemical taste in your coffee, then consider using filtered water or changing your filter more frequently because tap water quality varies.
• If your new filter doesn’t seem to fit, then double-check that you have the correct filter for your Keurig model because using the wrong one won’t work.
• If you’re unsure about the filter soak, then always err on the side of caution and soak it because it prevents charcoal dust in your coffee.
• If you brew a cup and it tastes weird right after changing the filter, then run another plain water cycle because the first one might have been a rinse.
• If your coffee has a metallic taste, then it could be the water filter or scale buildup, so check both and descale if needed.
• If your Keurig is making unusual noises, then check the water level first, and if it’s full, consider if the filter is clogged or if descaling is needed.
• If you’re looking for the absolute best taste, then use freshly ground beans and filtered water, but a clean filter is your first step.

FAQ

How often should I change my Keurig water filter?

Most manufacturers recommend changing it every two months or after brewing approximately 100 cups, whichever comes first.

What happens if I don’t change my Keurig water filter?

You’ll likely notice a decline in coffee taste, as minerals and chlorine from your tap water will start affecting the flavor. The machine might also start working harder and could develop scale buildup faster.

Can I use a generic water filter in my Keurig?

It’s best to stick with filters specifically designed for your Keurig model. Generic filters might not fit correctly, could cause leaks, or may not filter water as effectively.

Do I really need to soak the new filter?

Yes, for most charcoal filters, soaking is crucial. It helps to saturate the charcoal and flush out any loose particles before you start brewing coffee. Skipping this can lead to dusty coffee.

What kind of water should I use in my Keurig?

Filtered or bottled water is ideal. It significantly improves coffee taste by removing impurities that tap water might contain. If you must use tap water, ensure your water filter is changed regularly.

My Keurig is brewing slowly. Is it the filter?

A clogged water filter is a common culprit for slow brewing. Mineral buildup (scale) can also cause this. Check and replace your filter, and consider descaling your machine if it’s been a while.

Can I just rinse the old filter?

No, rinsing an old filter won’t restore its filtering capacity. The charcoal gets saturated with impurities over time, and its effectiveness diminishes. It needs to be replaced.

What’s the difference between a water filter and descaling?

The water filter removes impurities from the water before it brews, improving taste. Descaling removes mineral buildup (scale) from inside the machine, ensuring proper function and preventing damage. Both are important for great coffee.

What this page does NOT cover (and where to go next)

• Detailed troubleshooting for specific error codes or machine malfunctions.
• The best types of coffee beans or grind settings for Keurig machines.
• Deep cleaning procedures for the entire Keurig unit beyond basic descaling.
• Comparisons of different Keurig models or brewing technologies.
• Advanced brewing techniques like pour-over or French press.