If you own a Bunn coffee maker, you know it delivers a fast, reliable brew. But to keep it performing at its best, you need to know how to clean a Bunn coffee maker properly. Regular cleaning prevents mineral buildup, removes stale coffee oils, and ensures every pot tastes fresh. Neglecting this simple maintenance can lead to slower brewing, off-flavors, and even early machine failure. This guide will walk you through the entire process, from a quick daily wipe-down to a deep monthly descaling.
How Do I Clean a Bunn Coffee Maker
This main cleaning process focuses on decalcification, which is removing the limescale that accumulates from your water. It’s the most important task for the longevity of your machine. You’ll need a commercial descaling solution made for coffee makers or a natural alternative like white vinegar. Always check your specific model’s manual first, as instructions can vary slightly.
What You’ll Need for Deep Cleaning
- Bunn-approved descaling solution OR 1 quart of white vinegar
- 1 quart of fresh, cold water
- A clean, soft cloth or sponge
- A mild dish soap (for exterior parts)
- A soft-bristled brush (like an old toothbrush)
- A large pot or bowl (to catch water during some steps)
Step-by-Step Descaling Instructions
Step 1: Prepare Your Machine
Start by unplugging your Bunn coffee maker. Always let it cool completely if it was recently used. Remove the brew funnel, the coffee filter (and any grounds), and the spray head if your model has a removable one. Empty and rinse the decanter thoroughly.
Step 2: Mix the Descaling Solution
If using a commercial descaler, follow the package directions for dilution. If using white vinegar, mix equal parts vinegar and cold water in the empty decanter. You will need enough to fill the water reservoir, typically about one quart total.
Step 3: Run a Descaling Cycle
- Pour the entire mixture from the decanter into the brewer’s water reservoir.
- Place the empty decanter back on the warmer plate.
- Plug the brewer back in. For most Bunn models, you simply turn the brew switch to “ON.” The descaling solution will now run through the internal system and drain into the decanter. This takes a few minutes.
Step 4: Rinse the System Thoroughly
This step is crucial. You must remove all traces of the descaling solution or vinegar. Discard the liquid from the decanter. Rinse the decanter well. Fill the reservoir with fresh, cold water. Place the clean decanter back and run another full brew cycle. Repeat this rinse cycle at least two more times with fresh water each time to ensure no cleaning residue remains.
Step 5: Reassemble and Do a Final Test
Once the final rinse cycle is done, unplug the machine again. Reattach the spray head if you removed it. Wipe down the warmer plate, the exterior, and the reservoir with a damp cloth. Let everything air dry for a bit. To finish, plug it in and brew a pot of fresh water only. Discard this water. Your machine is now descaled and ready for great-tasting coffee.
Cleaning the Removable Parts
While the descaling handles the interior, the removable parts need separate attention. Coffee oils build up on these and can make coffee taste bitter.
- Spray Head: Soak it in warm, soapy water. Use a soft brush to clear any clogged holes. Rinse well.
- Brew Funnel & Decanter: Wash with warm soapy water after each use. For stubborn stains, a paste of baking soda and water works well. Avoid abrasive scrubbers that can scratch.
- Water Reservoir: Wipe it out with a damp cloth during your deep clean. Never submerge the main brewer unit.
How Often Should You Descale?
The frequency depends on your water hardness. If you have hard water, you might need to descale every month. With soft water, every 3 to 6 months may be sufficient. A good sign it’s time is if your brewer seems slower than usual or your coffee taste a bit off.
Daily and Weekly Maintenance Tips
A quick routine prevents big messes later. After each brew, discard used grounds and rinse the brew funnel and decanter. Wipe the warmer plate with a damp cloth to remove any coffee spills. Once a week, give the exterior a wipe with a damp cloth and wash the decanter and brew funnel thoroughly with soap.
Troubleshooting Common Issues
Even with cleaning, sometimes problems pop up. Here’s how to fix a couple common ones.
Machine is Dripping or Leaking
First, check that the brew funnel is correctly seated and locked in place. A misaligned funnel is a common cause of leaks. Next, ensure the spray head is properly attached and not cracked. Finally, check the decanter for hairline cracks, especially around the handle or lid.
Coffee Tastes Bad After Cleaning
This almost always means there’s residual cleaning solution or vinegar in the system. Run several more rinse cycles with fresh water only. Also, ensure all removable parts like the decanter and funnel are completely free of soap or baking soda residue.
FAQ Section
Can I use vinegar to clean my Bunn coffee maker?
Yes, white vinegar is a common and effective descaling agent for Bunn machines. Use a mix of half vinegar and half water. Just be sure to run multiple rinse cycles afterward to eliminate any vinegar taste.
How do you clean a Bunn coffee maker’s spray head?
Remove the spray head if possible. Soak it in warm, soapy water. Then, use a pin or a small brush to gently clear any clogged openings in the spray head. Rinse it thoroughly before reattaching.
What is the best way to clean a Bunn brewer’s tank?
For the internal water tank, you clean it by running a descaling solution through the entire system, as described above. For the exterior of the reservoir, just wipe it with a damp cloth. Do not immerse the main unit in water.
Why is my Bunn coffee maker not brewing fast anymore?
Slower brewing is a classic sign of mineral scale buildup in the internal tubes and heating elements. It’s a clear indicator that your machine is overdue for a thorough descaling. Follow the steps outlined to restore its speed.
Keeping Your Machine in Top Shape
Consistency is key. Mark your calendar for your descaling schedule based on your water. Use fresh, cold water for every brew cycle. And always start with a clean decanter and brew basket. These habits, combined with the regular deep cleaning, will extend the life of your Bunn significantly. A well-maintained machine not only makes better coffee but also saves you money on repairs or early replacement. Taking these steps ensures your morning routine stays reliable and your coffee tastes exactly as it should.