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Keurig K-Slim Single Serve K-Cup Pod Coffee Maker, Multistream Technology, 3 Brew Sizes, Slim and Sleek Design, 46oz Removable Reservoir, White
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Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
Learn more about free returns.- Go to your orders and start the return
- Select your preferred free shipping option
- Drop off and leave!
Purchase options and add-ons
Brand | Keurig |
Color | White |
Product Dimensions | 15.2"D x 4.7"W x 12.1"H |
Special Feature | Programmable |
Coffee Maker Type | Espresso Machine |
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About this item
- MULTISTREAM TECHNOLOGY: Extracts full flavor and aroma in every brew.
- FITS ANYWHERE: Less than 5 inches wide, perfect for small spaces.
- MULTIPLE CUP WATER RESERVOIR: Removable 46 oz. reservoir lets you brew up to *4 cups before refilling.
- BREWS MULTIPLE CUP SIZES: brew an 8, 10, or 12 oz. cup at the push of a button.
- FAST & FRESH BREWED: Coffee made in minutes.
- TRAVEL MUG FRIENDLY: Removable drip tray accommodates travel mugs up to 7.0” tall and holds a full accidental brew for easy cleanup.
- ENERGY EFFICIENT: Auto off feature turns off your coffee maker 5 minutes after the last brew, helping to save energy.
- COMPATIBLE WITH THE MY K-CUP UNIVERSAL COFFEE FILTER: Brew your own ground coffee (sold separately).
- BREWER SPECS: Brewer dimensions out of box 12.14” H x 4.76” W x 15.2” D. Height with handle open 17.28”. Brewer weight 6.22 lbs.Cord Length 29”. Voltage 120V
Competitively priced item
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From the manufacturer


MULTISTREAM TECHNOLOGY
Extracts more flavor and aroma* in every brew.
FITS ANYWHERE
Less than 5” wide, fits neatly on your countertop.
MULTIPLE CUP WATER RESERVOIR:
Removable 46 oz. reservoir lets you brew up to *4 cups before refilling.
3 CUP SIZES:
Brew an 8, 10, or 12 oz. cup at the push of a button.

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Customer Reviews |
4.4 out of 5 stars 60,721
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4.1 out of 5 stars 25,026
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4.6 out of 5 stars 37,625
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4.4 out of 5 stars 35,029
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4.4 out of 5 stars 38,852
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Price | $89.99$89.99 | $122.99$122.99 | — no data | $79.99$79.99 | $99.95$99.95 |
Single Serve Coffee | 8, 10, 12 oz. | 6, 8, 10 & 12 oz. | 6, 8, 10, 12 oz. | 8, 10, 12 oz. | Add Fresh Water each time 6 - 12 oz. |
MultiStream Technology | ✓ | ✓ | no data | no data | no data |
Water Reservoir Capacity | 46 oz removable | 66 oz removable | 52 oz removable | 42 oz removable | Add water each time, removable |
Strength / Temp Control | no data | Strong Brew Button | Strong Brew Button | Strong Brew Button | Strong Brew Button |
Product Dimensions | 12.1” H x 4.7” W x 15.2” D | 12.1” H x 7.9” W x 12.0” D (Tank at side) | 12.87" H x 4.56" W x 12.87" | 12.87" H x 4.56" W x 12.87" | 12.1” H x 4.5” W x 11.3” D |
Videos
Product information
Brand | Keurig |
---|---|
Color | White |
Product Dimensions | 15.2"D x 4.7"W x 12.1"H |
Special Feature | Programmable |
Coffee Maker Type | Espresso Machine |
Filter Type | Reusable |
Style | Coffee Maker |
Specific Uses For Product | General Coffee Preparation |
Recommended Uses For Product | Home Use, Office Use |
Exterior Finish | [Matte or Glossy] |
Included Components | Brewer |
Operation Mode | Fully Automatic |
Voltage | 110 Volts |
Model Name | K-Slim Coffee Maker |
Number of Items | 1 |
Human Interface Input | Buttons |
Customer Package Type | FFP |
Unit Count | 1.00 Count |
Global Trade Identification Number | 10611247391119 |
Manufacturer | Keurig |
Item Weight | 6.22 pounds |
ASIN | B08V8C8N42 |
Country of Origin | China |
Item model number | K900 |
Customer Reviews |
4.4 out of 5 stars |
Best Sellers Rank | #1,130 in Home & Kitchen (See Top 100 in Home & Kitchen) #5 in Single-Serve Brewers |
Date First Available | January 28, 2021 |
Warranty & Support
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Keurig K-Slim Single Serve K-Cup Pod Coffee Maker, Multistream Technology, 3 Brew Sizes, Slim and Sleek Design, 46oz Removable Reservoir, White
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Product Description
Enjoy ease and great taste in little space with the Keurig® K-Slim® single serve coffee maker. At just 5” wide, the K-Slim® coffee maker fits neatly on your countertop, making it the perfect choice for when space-saving and simplicity are important. The K-Slim® coffee maker brings together the performance and simplicity that Keurig® is known for, in a slim and sleek design. You also get the convenience you desire with the capacity to brew up to four 8 oz. cups before refilling the 46 oz. removable water reservoir, and the ability to enjoy a fast and fresh-brewed 8, 10, or 12 oz. cup at the push of a button. Choose from hundreds of flavorful K-Cup® pod varieties of coffee, tea, cocoa, and more. With the K-Slim® coffee maker, your delicious morning cup or midday pick-me-up is always ready in minutes, and you never have to sacrifice countertop space for taste again.
Product guides and documents
Top Brand: Keurig
Compare with similar items
This Item Keurig K-Slim Single Serve K-Cup Pod Coffee Maker, Multistream Technology, 3 Brew Sizes, Slim and Sleek Design, 46oz Removable Reservoir, White | Recommendations | |||||
Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | Try again! Added to Cart | |
Price | $89.49$89.49 | -11% $89.00$89.00 List: $99.99 | -33% $99.99$99.99 List: $149.99 | -21% $149.99$149.99 List: $189.99 | -20% $79.99$79.99 List: $99.99 | -25% $89.99$89.99 List: $119.99 |
Delivery | Get it as soon as Thursday, May 8 | Get it as soon as Thursday, May 8 | Get it as soon as Thursday, May 8 | Get it as soon as Thursday, May 8 | Get it as soon as Thursday, May 8 | Get it as soon as Thursday, May 8 |
Customer Ratings | ||||||
Sold By | Stelli Products | Amazon.com | Amazon.com | Amazon.com | Amazon.com | Amazon.com |
capacity | 36 fluid ounces | 36 ounces | 8 ounces | 0.5 gallons | 42 fluid ounces | 42 ounces |
material | Plastic | Plastic, Stainless Steel | Plastic | Plastic | Plastic | Stainless Steel |
input interface | buttons | buttons | buttons | buttons | buttons | buttons |
voltage | 110 volts | 120 volts of alternating current | 120 volts | 110 volts | — | 100 volts |
wattage | 1500 watts | 1000 watts | — | 1500 watts | 1000 watts | 1000 watts |
model name | K-Slim Coffee Maker | K-Slim | K-Classic Coffee Maker | K-Elite Coffee Maker | K-Express | K-Iced |
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers appreciate the coffee maker's slim design that fits perfectly in small spaces, and they find it easy to use and quick at brewing. The coffee quality is good, and customers like its clean, no-fuss appearance. The functionality and water capacity receive mixed reviews - while some say it works well, others report it stops working after two months, and while the water reservoir holds enough, some mention it requires more water than expected. The quality aspect also gets mixed feedback, with some describing it as great while others find it defective.
AI-generated from the text of customer reviews
Customers appreciate the coffee maker's compact size, noting that it fits perfectly in small spaces, has a great cup size option, and takes up minimal countertop space.
"...Having the extra counter space has been such a nice benefit. But moreso, the coffee is hot and, so far, the machine reliable...." Read more
"I like that this device is compact and blends with white countertops and cabinets. Perfect for beach house when guests can make their own cup...." Read more
"...The compact size makes it easy to tuck away on the counter." Read more
"...I like that this coffee maker is thin and fits on my little refridgerator...." Read more
Customers find that the coffee maker delivers a great cup every time, with delicious results for both coffee and coco.
"...The coffee (Caza Trail Cona Blend) is as hot and tastes as good, possibly even stronger, than my old model - Auto Shut-Off!..." Read more
"...Be sure to descale about once a month. Quickly brews a great tasting cup of coffee. Has lasted a year with no problems and is a great value." Read more
"Makes good coffee. Must line up the cups to put coffee in or the handle will not pull down. Love the slim lines of the coffee maker." Read more
"Great little coffee maker. It's easy to use and easy to clean with its removeable water reservoir...." Read more
Customers find the coffee maker easy to use and set up, with one mentioning that the descale feature simplifies maintenance.
"...Easy/obvious to use, and I really like the "level" drop in hole for the k-cup. All my others were at an angle for some reason. -..." Read more
"...It's quiet, quick, and easy breezy. It fits slim and tidy on the counter and slips beneath a kitchen cabinet...." Read more
"Great little coffee maker. It's easy to use and easy to clean with its removeable water reservoir...." Read more
"Simple and beautiful. Love the color and the material doesn’t stain with coffee. Easy to clean and use." Read more
Customers appreciate the coffee maker's brewing speed, noting that it makes great coffee very fast and is ready in about a minute, with quick water heat-up time.
"...That might seem aggressive but... - Really fast water heat-up time. I was really amazed...." Read more
"...There is almost no waiting time for the brew to start even if refrigerated water is used...." Read more
"This is the finest easiest coffee maker I've ever used. It's quiet, quick, and easy breezy...." Read more
"...Wonderful and convenient for entertaining. Love the white, how quick and delicious my coffee tastes and they everybody can choose their own faves." Read more
Customers appreciate the coffee maker's design, describing it as clean and easy to use, with one customer noting it's nice to display on the countertop.
"...Even better, it's a simple rectangle design that I can maneuver easily to and fro my fridge...." Read more
"...It's quiet, quick, and easy breezy. It fits slim and tidy on the counter and slips beneath a kitchen cabinet...." Read more
"Looks great. Was a great price. Can never go wrong with a Keurig!" Read more
"Simple and beautiful. Love the color and the material doesn’t stain with coffee. Easy to clean and use." Read more
Customers report mixed experiences with the coffee maker's functionality, with some saying it works very well, particularly with their own coffee, while others mention it stops working within a month or won't turn on again.
"...After about ten months of use I could not get the unit to operate correctly. Keurig sent a second warranty replacement. ****..." Read more
"...The coffee they serve is decaf Folgers and absolutely terrible. Weak, not hot enough, tastes like they haven't cleaned their coffee maker since..." Read more
"Excellent product works perfect." Read more
"...I conducted a descaling process last week and the machine did not turn back on again...." Read more
Customers have mixed opinions about the coffee maker's quality, with some finding it great while others report serious lack of quality and describe it as the worst coffee pot.
"Seems cheaply made, feel like I’m going to break the pod lid every time I close it...." Read more
"This is the finest easiest coffee maker I've ever used. It's quiet, quick, and easy breezy...." Read more
"...the reservoir bottom creating a hole. Now unusable. I’m not sure what they make those reservoirs out of...." Read more
"For a Keurig, I expected better quality. Feels like a flimsy knock-off...." Read more
Customers have mixed opinions about the coffee maker's water capacity, with some noting that the reservoir holds enough water and is easily filled, while others report that the machine requires more water than expected.
"...This model only has 3 cup sizes, but has the same 40oz reservoir as the K200...." Read more
"...It fits nicely on the countertop and it's easy to refill with water to make additional coffee." Read more
"...No issues with the descale cycle. My issue is the amount of brew is gradually reduced to about two ounces less than the selected brew...." Read more
"...Sometimes, the machine prompts me to add more water, even though there's still plenty left in the tank." Read more
Reviews with images

K-Slim: Successful reclaim of countertop!
Top reviews from the United States
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- Reviewed in the United States on April 15, 2025Color: BlackVerified PurchaseThis is the finest easiest coffee maker I've ever used. It's quiet, quick, and easy breezy. It fits slim and tidy on the counter and slips beneath a kitchen cabinet. The washable, detachable, refillable water tank a huge bonus! Highly recommended.
- Reviewed in the United States on February 27, 2025Color: BlackVerified PurchaseI purchased this coffee maker in October of last year and I just love it. However, I conducted a descaling process last week and the machine did not turn back on again. I called Keurig and we went through a series of attempts to get it to turn on to no avail. When it became apparent that it was no longer functioning, the customer service agent sent me a form to fill out online. I attached proof of purchase and a photo of the serial number. I now have a new coffee maker coming soon! I'm impressed with the customer service provided by Keurig. And their coffee makers make delicious coffee!
- Reviewed in the United States on June 7, 2020Color: BlackVerified PurchaseI don't typically write reviews, especially for something as trivial as a coffee maker, but this was an interesting journey. I had an ancient, by comparison, Keurig B55 that most resembles the "Classic" model they offer currently. Probably going on 11 years, it finally died. Up until that point, this portion of my counter was basically a coffee station, forcing me to do all my kitchen prep to the right of the stove, keeping the shrine to caffeine unadulterated.
I was stunned at all the variants of the Keurig line. It's almost dizzying and makes it nearly impossible to choose one. Some quick googling showed 60+ models, most of which are still sold. Do I need 5 cup sizes (5oz - 14oz)? How about a "strong" setting? Does it do anything? A screen? Or a timer? Or a larger reservoir? What about no reservoir? Seriously, the paradox of choice here is maddening.
Having come from a "screened" maker in my previous model, I ended up opting for the K200 model. This one is about 3" less wide that my previous maker, so that was nice. Unfortunately, it had a few issues that I simply could not work around.
- The reservoir is U-shaped and honestly very awkward to negotiate both from a refilling and removing perspective. Especially if it's under a cabinet, and you want to refill from a refrigerator water dispenser, as I do.
- The coffee was simply not hot enough. Not sure if I got a bum unit, or that's how it is, but it was significantly less hot than what I was used to.
- No auto shut-off. Seriously. I thought this was a basic in coffee makers. This, probably the biggest deal-breaker of them all, though, mildly hot coffee was a close second.
Enter the K-Slim. I was skeptical because the reviews were, pun intended, no so hot. But the price was right, and I really liked the idea of a sub five-inch width coffee maker on my countertop. This model only has 3 cup sizes, but has the same 40oz reservoir as the K200. Even better, it's a simple rectangle design that I can maneuver easily to and fro my fridge. Having the extra counter space has been such a nice benefit. But moreso, the coffee is hot and, so far, the machine reliable.
What I like:
- The coffee (Caza Trail Cona Blend) is as hot and tastes as good, possibly even stronger, than my old model
- Auto Shut-Off! Unit turns off after 5 minutes of last brew. That might seem aggressive but...
- Really fast water heat-up time. I was really amazed. From off to coff(ee) was only a minute or two, obviating the need for a clock/timer function.
- Easy/obvious to use, and I really like the "level" drop in hole for the k-cup. All my others were at an angle for some reason.
- Amazingly diminutive size for the countertop reclaim.
What I don't like:
- Maybe one smaller cup size? But that's it.
Really happy so far with this unit. Hoping it lasts me as long as the last one did.
5.0 out of 5 starsI don't typically write reviews, especially for something as trivial as a coffee maker, but this was an interesting journey. I had an ancient, by comparison, Keurig B55 that most resembles the "Classic" model they offer currently. Probably going on 11 years, it finally died. Up until that point, this portion of my counter was basically a coffee station, forcing me to do all my kitchen prep to the right of the stove, keeping the shrine to caffeine unadulterated.K-Slim: Successful reclaim of countertop!
Reviewed in the United States on June 7, 2020
I was stunned at all the variants of the Keurig line. It's almost dizzying and makes it nearly impossible to choose one. Some quick googling showed 60+ models, most of which are still sold. Do I need 5 cup sizes (5oz - 14oz)? How about a "strong" setting? Does it do anything? A screen? Or a timer? Or a larger reservoir? What about no reservoir? Seriously, the paradox of choice here is maddening.
Having come from a "screened" maker in my previous model, I ended up opting for the K200 model. This one is about 3" less wide that my previous maker, so that was nice. Unfortunately, it had a few issues that I simply could not work around.
- The reservoir is U-shaped and honestly very awkward to negotiate both from a refilling and removing perspective. Especially if it's under a cabinet, and you want to refill from a refrigerator water dispenser, as I do.
- The coffee was simply not hot enough. Not sure if I got a bum unit, or that's how it is, but it was significantly less hot than what I was used to.
- No auto shut-off. Seriously. I thought this was a basic in coffee makers. This, probably the biggest deal-breaker of them all, though, mildly hot coffee was a close second.
Enter the K-Slim. I was skeptical because the reviews were, pun intended, no so hot. But the price was right, and I really liked the idea of a sub five-inch width coffee maker on my countertop. This model only has 3 cup sizes, but has the same 40oz reservoir as the K200. Even better, it's a simple rectangle design that I can maneuver easily to and fro my fridge. Having the extra counter space has been such a nice benefit. But moreso, the coffee is hot and, so far, the machine reliable.
What I like:
- The coffee (Caza Trail Cona Blend) is as hot and tastes as good, possibly even stronger, than my old model
- Auto Shut-Off! Unit turns off after 5 minutes of last brew. That might seem aggressive but...
- Really fast water heat-up time. I was really amazed. From off to coff(ee) was only a minute or two, obviating the need for a clock/timer function.
- Easy/obvious to use, and I really like the "level" drop in hole for the k-cup. All my others were at an angle for some reason.
- Amazingly diminutive size for the countertop reclaim.
What I don't like:
- Maybe one smaller cup size? But that's it.
Really happy so far with this unit. Hoping it lasts me as long as the last one did.
Images in this review
- Reviewed in the United States on March 24, 2025Color: WhiteVerified PurchaseLove my slim keurig! Frees up so much space and allows me to add more homey elements in the future. Wonderful and convenient for entertaining. Love the white, how quick and delicious my coffee tastes and they everybody can choose their own faves.
Love my slim keurig! Frees up so much space and allows me to add more homey elements in the future. Wonderful and convenient for entertaining. Love the white, how quick and delicious my coffee tastes and they everybody can choose their own faves.
Images in this review
- Reviewed in the United States on February 2, 2025Color: WhiteVerified PurchaseSeems cheaply made, feel like I’m going to break the pod lid every time I close it. I had the duel Keureg pit/cup maker prior which is extremely well made and sturdy. Brewing super quickly and delivers a great cup every time, thus far. I like the slim design, and white color. I can’t seem to detach the water carafe, so that’s a bummer. Decent product for the price.
- Reviewed in the United States on April 15, 2025Color: BlackVerified PurchaseGreat little coffee maker. It's easy to use and easy to clean with its removeable water reservoir. It fits nicely on the countertop and it's easy to refill with water to make additional coffee.
- Reviewed in the United States on October 14, 2022Color: BlackVerified PurchaseI purchased the K-Slim to save counter space and got rid of an older working Keurig. I gave the K-Slim the benefit of the doubt, but it failed to perform properly.
FIRST THE GOOD
There are no bells and whistles such as temperature control, brew strength, power on timer, etc. This is in the product description, user manual and reflected in the selling price. I don’t need or want bells and whistles. I am not a picky coffee drinker so the K-Slim should have worked for me. I will even drink gas station coffee.
There is almost no waiting time for the brew to start even if refrigerated water is used. Insert a K Cup, select brew size, press the brew button and the brew will start in about ten seconds.
From my personal experience Keurig has excellent consumer support where you can make a voice call and speak with a live person. For valid warranty claims a replacement is a no hassle, with free shipping included.
NOW THE BAD
**** ORIGINAL UNIT (single entry needle style)
Purchased October 2020. I followed the user manual descale instructions exactly. When brewing coffee, the reservoir will brew three 12-ounce cups before the add water LED is displayed. This is normal. While in descale mode instructions say to keep pressing the brew button until the add water LED is illuminated. After the third 12 ounce cup of descale solution the add water LED did not come on. So, I pressed the brew button again and the power died and the unit would not power back on.
Since the K-Slim does not have an internal water tank I suspect the unit overheated and a (should have) safety feature kicked in to prevent a possible fire. I googled my situation and found another person with the same issue. Maybe a software bug?
**** WARRANTY REPLACEMENT #1 (single entry needle style)
Replaced August 2021. No issues with the descale cycle. My issue is the amount of brew is gradually reduced to about two ounces less than the selected brew. 12oz selected=10 oz. 10 oz selected=8 oz. I confirmed the amount of water without a K Cip pod and using a measuring cup. See attached photos.
To return the unit back to the correct water dispense I will have to run one or two descale cycles. I also cleaned the unit including needles per the user guide.
The user guide says to descale every three months. To be fair a more frequent descaling may be required depending on water quality and amount of use. I use filtered tap water and we brew about four cups daily on average. I descale no more than every four weeks to return the unit back to the correct brew size. I had a couple of non K-Slim Keurigs in the past and did not have these issues.
I used the Keurig brand descale solution and a third-party generic solution with the same results. After about ten months of use I could not get the unit to operate correctly. Keurig sent a second warranty replacement.
**** WARRANTY REPLACEMENT #2 (newer “Multistream Technology” five entry needles)
Replacement July 2022. It is now mid October 2022 and it has only been about three weeks since the last descale. My 12-ounce brew is only getting 10 ounces again. Time to descale again.
**** FINAL THOUGHTS
Keurig does make some good products, but the K-Slim is a dud. I assume I am not the only one with this K-Slim issue. I will not ask for another K-Slim warranty replacement. I am going to shop for another brewer. Maybe another model Keurig, maybe not. For the amount of money I spend on descale solution the K-Slim is not worth keeping.
MY SPECULATION
The K-Slim does not have an internal water tank as confirmed in the following quote from Keurig:
“Unlike the other Keurig systems, the K-Slim coffee maker has no internal water tank. As a result, only the external Water Reservoir needs to be emptied prior to storing.”
The K-Slim heats water using heating tubes as it is pumped from the external reservoir. I confirmed this by watching youtube videos showing the internal parts. I suspect the design of the K-Slim does not allow the descale solution to stay in the unit long enough to do its job.
******** UPDATE 10/25/2020 ********
The low output of my third warranty replacement is getting worse even with descaling. I purchased another brand coffee maker. Before recycling the K-Slim I removed the cover. I added a couple of photos to this review showing the heating tube and thermal switch (safety feature) I discussed in my original review.
******** End Of Update ************
1.0 out of 5 starsI purchased the K-Slim to save counter space and got rid of an older working Keurig. I gave the K-Slim the benefit of the doubt, but it failed to perform properly.Bad - Two Warranty Replacements
Reviewed in the United States on October 14, 2022
FIRST THE GOOD
There are no bells and whistles such as temperature control, brew strength, power on timer, etc. This is in the product description, user manual and reflected in the selling price. I don’t need or want bells and whistles. I am not a picky coffee drinker so the K-Slim should have worked for me. I will even drink gas station coffee.
There is almost no waiting time for the brew to start even if refrigerated water is used. Insert a K Cup, select brew size, press the brew button and the brew will start in about ten seconds.
From my personal experience Keurig has excellent consumer support where you can make a voice call and speak with a live person. For valid warranty claims a replacement is a no hassle, with free shipping included.
NOW THE BAD
**** ORIGINAL UNIT (single entry needle style)
Purchased October 2020. I followed the user manual descale instructions exactly. When brewing coffee, the reservoir will brew three 12-ounce cups before the add water LED is displayed. This is normal. While in descale mode instructions say to keep pressing the brew button until the add water LED is illuminated. After the third 12 ounce cup of descale solution the add water LED did not come on. So, I pressed the brew button again and the power died and the unit would not power back on.
Since the K-Slim does not have an internal water tank I suspect the unit overheated and a (should have) safety feature kicked in to prevent a possible fire. I googled my situation and found another person with the same issue. Maybe a software bug?
**** WARRANTY REPLACEMENT #1 (single entry needle style)
Replaced August 2021. No issues with the descale cycle. My issue is the amount of brew is gradually reduced to about two ounces less than the selected brew. 12oz selected=10 oz. 10 oz selected=8 oz. I confirmed the amount of water without a K Cip pod and using a measuring cup. See attached photos.
To return the unit back to the correct water dispense I will have to run one or two descale cycles. I also cleaned the unit including needles per the user guide.
The user guide says to descale every three months. To be fair a more frequent descaling may be required depending on water quality and amount of use. I use filtered tap water and we brew about four cups daily on average. I descale no more than every four weeks to return the unit back to the correct brew size. I had a couple of non K-Slim Keurigs in the past and did not have these issues.
I used the Keurig brand descale solution and a third-party generic solution with the same results. After about ten months of use I could not get the unit to operate correctly. Keurig sent a second warranty replacement.
**** WARRANTY REPLACEMENT #2 (newer “Multistream Technology” five entry needles)
Replacement July 2022. It is now mid October 2022 and it has only been about three weeks since the last descale. My 12-ounce brew is only getting 10 ounces again. Time to descale again.
**** FINAL THOUGHTS
Keurig does make some good products, but the K-Slim is a dud. I assume I am not the only one with this K-Slim issue. I will not ask for another K-Slim warranty replacement. I am going to shop for another brewer. Maybe another model Keurig, maybe not. For the amount of money I spend on descale solution the K-Slim is not worth keeping.
MY SPECULATION
The K-Slim does not have an internal water tank as confirmed in the following quote from Keurig:
“Unlike the other Keurig systems, the K-Slim coffee maker has no internal water tank. As a result, only the external Water Reservoir needs to be emptied prior to storing.”
The K-Slim heats water using heating tubes as it is pumped from the external reservoir. I confirmed this by watching youtube videos showing the internal parts. I suspect the design of the K-Slim does not allow the descale solution to stay in the unit long enough to do its job.
******** UPDATE 10/25/2020 ********
The low output of my third warranty replacement is getting worse even with descaling. I purchased another brand coffee maker. Before recycling the K-Slim I removed the cover. I added a couple of photos to this review showing the heating tube and thermal switch (safety feature) I discussed in my original review.
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Images in this review
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