Keurig Water Reservoir Problems? 5 Fixes

What Keurig's Guides Say About the Reservoir

Keurig's Use & Care Guides mention the water reservoir in three troubleshooting rows. "Brewer Will Not Brew": add water, fill to (not beyond) MAX, and make sure the reservoir is seated properly in its base. "Brewing a Partial Cup": the reservoir may have been removed during brewing. ADD WATER still lit after refilling: contact Customer Service. They also give a minimum: most brewers need 6 oz of water to brew, and if one won't start, you add 2 oz more and try again.

None of the eleven guides read for this site describes a float, a magnet or an optical sensor in the reservoir, and none tells you to clean "sensor contacts" or turn the brewer upside down. The fixes below stick to what the guides do say.

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Try This First

• Lift the reservoir out and set it back down firmly in its base.
• Fill to the MAX line, not beyond it.
• Add 2 more ounces if it won't start, then press brew again.
• Don't lift the reservoir mid-brew.
• Check the water filter (if fitted) is seated in the reservoir.

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What's Going Wrong?

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Fix 1: Fill Past the Minimum and Seat It (Works About 40% of the Time)

The K-Slim guide is specific: "A minimum of 6oz of water is required to brew. Add an additional 2oz of water to the reservoir to ensure the minimum fill level has been met, then press the brew button. Repeat until the brewer begins to dispense." The K-Duo guides add: "Make sure the water reservoir is seated properly in its base." The K-Express says: "Lift up and replace the reservoir to ensure a secure fit."

1. Lift the reservoir off and fill it to MAX, but not beyond.
2. Set it back in its base and press it down so it seats fully.
3. Press brew. If nothing happens, add 2 oz and press again. Repeat until it dispenses.

Time: 2 minutes
Cost: Free
Success Rate: About 40%
Difficulty: Easy

The K-Mini has no reservoir to seat. You pour 6-12 oz in for each cup.

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Fix 2: Rinse After Lifting the Reservoir Mid-Brew (Works About 20% of the Time)

Keurig's partial-cup row on the K-Elite and K-Duo says: "The water reservoir may have been removed during brewing. Replace the water reservoir and perform a rinsing brew without a K-Cup pod."

1. Put the reservoir back and seat it.
2. Run a water-only brew with no pod.
3. Brew your coffee.

Time: 2 minutes
Cost: Free
Success Rate: About 20%
Difficulty: Easy

Still short? Clear the needles (paper clip into the exit needle and the entrance needle holes), then descale. After two descales, Keurig says to contact Customer Service.

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Fix 3: Stop Overfilling and Empty the Drip Tray (Works About 15% of the Time)

The guides say to fill to, and not beyond, the MAX line. Water you see on the counter is often the drip tray, which holds about 8 oz on the K-Slim, K-Supreme, K-Mini and K-Elite and 4 oz on the K-Duo Essentials.

1. Fill only to MAX.
2. Empty the drip tray before it's full.
3. Store the brewer upright. The K-Elite and K-Duo guides say this avoids water leaking from the inner tank.

Time: 1 minute
Cost: Free
Success Rate: About 15%
Difficulty: Easy

For leaks that aren't the tray or overfilling, see our Keurig leaking guide.

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Fix 4: Clean the Reservoir and Change the Filter (Works About 15% of the Time)

The guides tell you to keep the reservoir clean, fresh and filtered.

1. Wash the reservoir and lid by hand. The K-Express guide says its parts are not dishwasher safe.
2. Rinse well, and refill with fresh water. Don't use distilled water (K-Slim and K-Mini guides).
3. Change the water filter every 2 months on models that have one (K-Express, K-Brew+Chill).
4. Empty the reservoir before storing or moving the brewer.

Time: 10 minutes
Cost: A replacement filter, if due
Success Rate: About 15%
Difficulty: Easy

Before descaling, remove the water filter from the reservoir. All the guides say so.

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Fix 5: ADD WATER That Won't Clear Is a Call to Keurig (Works About 10% of the Time)

If ADD WATER stays lit with a full, properly seated reservoir, Keurig's guides stop there: "If the add water light continues to be illuminated even after refilling, contact Customer Service." The SMART guide says the same of its Add Water warning.

1. Refill to MAX and reseat once more.
2. If it persists, call Keurig Customer Service: 1-866-901-BREW (2739).

Time: A phone call
Cost: Depends on warranty
Success Rate: About 10%
Difficulty: Easy

Keurig's guides say the brewers aren't user serviceable beyond cleaning and maintenance.

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Keep the Reservoir Trouble-Free

• Fill to MAX (not beyond), and keep at least 6 oz in it.
• Seat it firmly every time you refill.
• Leave it in place until the brew finishes.
• Clean it regularly and change the filter every 2 months.
• Empty it before storage, and let a cold brewer warm up for 2 hours before use.

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FAQ

Why does my Keurig say ADD WATER when the tank is full?

First, check it's above the minimum: Keurig says to add 2 oz more and press brew again. Then lift the reservoir and seat it firmly. If ADD WATER still stays on, Keurig's guides say to contact Customer Service. They describe no sensor to clean.

Does the Keurig reservoir have a magnet or float?

None of the eleven Keurig Use & Care Guides read for this site describes one. Their remedies are the water level, seating the reservoir, and contacting Customer Service if ADD WATER persists.

Can I put the Keurig reservoir in the dishwasher?

The K-Express guide says its parts are not dishwasher safe, so wash the reservoir and lid by hand. Check your own model's guide.

How much water does a Keurig need to brew?

At least 6 oz on the K-Slim and K-Supreme SMART. If it won't start, add 2 oz and press brew again. The K-Mini is filled per cup, with 6 oz minimum and 12 oz maximum.

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Related Keurig Guides

• Keurig Not Brewing a Full Cup?: partial cups and needles
• Keurig Add Water Light Won't Turn Off?: the alert in detail
• Keurig Leaking Water?: leaks beyond the reservoir
• Keurig Error Codes Complete Guide: every Keurig alert

Sources: Keurig Use & Care Guides for the K-Slim, K-Express, K-Elite, K-Duo Plus, K-Duo Essentials (Gen 2), K-Supreme SMART, K-Mini and K-Brew+Chill.