How to Clean Bunn Coffee Makers? [+ Tips & Tricks]

Just so you know, this post contains affiliate links and we may earn a small commission if you buy something.

How to clean Bunn coffee makers
Share on facebook
Share on twitter
Share on linkedin
Share on reddit
Share on pinterest

Even the most trusted coffee machines, like Bunn, require regular cleaning. Coffee oils, dirt, and hard water leftovers can prevent your best kitchen buddy from running at peak performance. That’s why in this article we’ll help you by spreading the wisdom on how to clean Bunn coffee makers!

Here’s how to clean your Bunn brewer in 6 SUPER easy steps:

  1. Unplug the unit from the wall
  2. Make a 50:50 cleaning solution consisting of vinegar and water
  3. Pour the mixture into the reservoir of your Bunn machine
  4. Plug and start the machine
  5. Run a brew cycle with the cleaning mix
  6. Discard the content
    Optional: Run another cycle if needed
  7. Run a few water-only cycles to get rid of any vinegar smell and taste

Below, we are sharing some neat routine cleaning and maintenance tips for your Bunn maker.

They will inevitably help to breathe in new life into your coffee machine.

How Often to Wash Your Bunn Coffee Maker?

Ideally, you’d want to wash it after every single use.

That’s because dirt accumulates around the decanter and brew funnel each time you run your Bunn unit.

Hand-wash all of the removable parts with warm soapy water or simply throw them into your dishwasher.

This will prevent any germs and bacteria from eventually making their way into your coffee.

And don’t forget to wipe the warming plate and the exterior, too.

Also, when you’re cleaning your Bunn brewer – make sure to leave the reservoir lid open for about one hour and allow it to dry completely.

Moisture encourages the buildup of germs, which is why it is important not to close the water reservoir immediately after cleaning the machine.

How to clean Bunn coffee makers, a woman making coffee

How Often to Clean Your Bunn Coffee Maker?

Once a month is perfectly acceptable unless you have spare time and want to clean your brewer more frequently.

Now, it is important to note washing and cleaning/decalcifying your machine are two different things.

Cleaning is not only tied to keeping your Bunn in perfect shape, so to speak.

It’s also related to getting rid of any mineral buildup that might spoil the taste of your cups, while slowing the machine down as well.

BUNN GRB Velocity Brew 10-Cup Home Coffee...
11,195 Reviews
BUNN GRB Velocity Brew 10-Cup Home Coffee...
  • Fastest 10-Cup Home Coffeemaker brews a full pot...
  • An always hot internal hot water is ready to brew...
  • Exclusive drip-free carafe with a proprietary lid...

How to Clean a Bunn Coffee Maker [Step-by-Step Guide]

There are several main steps that you have to take in order to clean your Bunn coffee machine the right way.

  • Firstly you should remove lime deposits from the spray head
  • Then brush off hard water and magnesium deposits from the interior
  • Finally, you have to clean the carafe

By following these 3 primary steps you’ll ensure that you’re doing things in the most optimal manner!

1. Lime Deposits Removal

  1. Unplug your Bunn coffee maker from the power outlet
  2. Locate the spray head
    Note: It is just above the decanter – underneath the top part of your Bunn coffee maker
  3. Unscrew the spray head and place it on a dishtowel
  4. Find the probe you received in the box along with your coffee maker
  5. Insert the probe into a hole where the spray head used to be
  6. Leave 2 inches of the probe outside the hole
  7. Shake the probe a bit so crusty deposits start falling out of the machine and repeat 5 to 6 times
  8. Take the spray head and check whether all the holes are clog-free
  9. If you notice any deposits inside the holes, take a toothpick or your old toothbrush and remove the deposits
  10. Place the spray head underneath the tap and allow fresh water to run through the holes
  11. Once you are sure there is no more buildup left, dry the spray head, and screw it into place

And don’t be too hard on yourself – you are not the one to blame for the lime deposits buildup.

Various impurities in the water and lime deposits can easily attach to the spray head of your Bunn unit.

Thus, it would be best to clean this part every 2 to 4 weeks.

2. Hard Water Cleaning

  1. Unplug the machine
  2. Make sure the brew funnel is in place
  3. Place the decanter in a position as if you are about to make a cup of coffee
  4. Pour 4 cups of a 50:50 cleaning solution (distilled vinegar and water) to the brewer
  5. Allow the vinegar to flow through the funnel and into the decanter
  6. Remove the decanter to properly clean it and then put it back in place
  7. Re-plug the machine and let it sit for 2 hours
  8. After 2 hours, unplug it again
  9. Pour 4 cups of cold water and let them flow through the system
  10. Empty the decanter and set it back
  11. Add another 4 cups of water and repeat the whole process
  12. Unscrew the spray head and set it aside
  13. Grab the machine right under the warming plate while holding the top of it with your other hand
  14. Let the remaining fluid run out into the sink
  15. Screw the spray head back and plug the machine into the wall
  16. Pour another 6 to 8 cups into the unit and brew it
  17. Empty the decanter but make sure to do a water taste test
  18. If you notice a vinegary taste, run another brew/s

Look, hard water deposits can affect your Bunn’s performance in a negative way.

So make sure to do this cleaning method regularly and you will be able to extend your coffee maker’s life and make your cups taste better.

And if you don’t have vinegar, here are some great alternatives:

  • Coffee maker cleaners
  • A mixture of water and two denture tablets
  • Straight bleach
  • Citric acid that’s dissolved in 50:50 hot-cold water

3. Thermal Carafe Cleaning

  1. Take 2 tablespoons of powdered dishwasher detergent and pour the content into a brewing filter
  2. Fill the carafe with water and turn your Bunn coffee maker on
  3. Discard the filter but leave the water to sit in the decanter for another 10 to 15 minutes
  4. Use a soft-bristle bottle brush to clean the inside of the carafe
    Note: Move the brush around the carafe gently to remove coffee stains
  5. Rinse with cold water

Alternatively, if you have a liquid alkaline-based detergent at hand, you can use it to clean the carafe lid.

Rinse with water and put it back in place.


1. Why is my Bunn coffee maker so slow?

It is highly likely that your Bunn coffee maker needs some cleaning.

The machine’s slow brewing pace is usually a result of calcium and mineral buildup.

Make sure to follow our guide on how to clean a Bunn coffee maker from hard water-related issues.

However, if that doesn’t solve your problem then a clogged valve could be another possible reason.

Remove and wash the valve from any coffee grinds that might be trapped inside or around it.

2. How long does a Bunn coffee maker last?

If you take proper care of your Bunn coffee maker, it will last for several years… at least.

However, if you don’t clean it regularly, the brewing process will soon begin slowing down.

This more often than not happens sometime after you celebrate your Bunn’s first birthday i.e. after 1 year.

3. How long does it take for water to warm up in a Bunn?

15 minutes at most.

After that time, you will have instant hot water if your machine remains plugged into the power source.

Still, if it takes much longer than 15 minutes for your Bunn to warm water up, then that’s a clear sign that you should clean/decalcify it.

4. How to empty Bunn coffee maker?

  1. Unplug the machine
  2. Turn it upside down
  3. Place it over a sink
  4. Continue holding it until there is no more water/coffee in it
  5. Give it a few gentle shakes to make sure any leftover residue is removed

5. Is it safe to run vinegar through my Bunn coffee maker?

Yep, it’s absolutely safe to run a brewing cycle using vinegar.

Vinegar is not harmful to your health although it can definitely spoil the taste of your coffee.

Thus, inspect the taste of the water that comes out of the coffee maker once you’re done cleaning it.

Brew another water-only cycle to get rid of any vinegary taste that you might stumble upon.


It’s safe to say that coffee aficionados who prefer speed, convenience and an impeccable coffee flavor, typically go for Bunn coffee makers.

And there’s no doubt that taking care of your Bunn brewer is essential for its longevity and proper functioning.

Thankfully – now you know how to clean it the right way!

Do you have a Bunn brewer btw?

And are you washing and cleaning it regularly?

We would love to hear about your cleaning routine so leave a comment in the section below!

Last update on 2022-05-01 / Affiliate links / Images from Amazon Product Advertising API

Simon Slavchev

Simon Slavchev

Did somebody say coffee? Two shots of espresso for me, thanks. Oh, nevermind - I'm Simon, nice to e-meet you, dear CoffeeLifior! I like to write, drink coffee and I believe in Jesus. Highly-caffeinated drinks are my thing, but you can occasionally see me sip on decaf (my wife never finishes her coffee). Speaking of which, I'm off to grab another cup of caffeinated goodness now, laters!

Save %25 and get a FREE mug with your next coffee pod order!

We have partnered with Tayst Coffee to offer the best deal on sustainable coffee pods to our readers. If you click on the button below, you’ll be taken to their exclusive discount page.

Tayst coffee bag

Leave a Comment

Your email address will not be published.