Deliming Your Bunn Axiom Coffee Maker
Quick answer
- Regular deliming prevents mineral buildup, ensuring optimal performance and taste.
- Use a commercial deliming solution or white vinegar, but never mix them.
- Always unplug the brewer and allow it to cool completely before starting.
- Follow the manufacturer’s instructions for your specific Bunn Axiom model.
- Flush the system thoroughly with clean water after deliming to remove all residue.
- Delime every 3-6 months, or more often in areas with hard water.
- Ignoring deliming can lead to slow brewing, poor taste, and premature failure.
For best results and to ensure compatibility, we recommend using a commercial deliming solution specifically designed for coffee makers.
- Powerful Salt & Scale Removal - Effectively removes urinal scale, rust, and mineral deposits that contribute to slow drainage and odors. This professional-grade urinal cleaner descaler penetrates deep into salt build-up to restore full flow and reduce the need for a urinal auger or snake
- Stop Odor At The Source - Neutralizes odor-causing buildup in urinals and pipes for fresher-smelling restrooms. This commercial-strength formula neutralizes odor-causing buildup deep in pipes, leaving facilities fresh and clean
- Safe on Plumbing & Easy To Use - Safe for all drains and plumbing, but tough on salt, calcium, and scale build-up. The commercial-grade calcium remover powers through deposits without damage or harsh fumes. Simply pour 8 ounces into the drain, wait 1–2 hours, and flush
- Safe on Plumbing & Easy To Use - Safe for all drains and plumbing, but tough on salt, calcium, and scale build-up. The commercial-grade urinal cleaner powers through deposits without damage or harsh fumes. Simply pour 8 ounces into the drain, wait 1–2 hours, and flush
- Pro-Grade Results, Made In Usa – Trusted by janitors, maintenance pros, and facility managers. Proudly American-made, this heavy duty toilet descaler delivers results for high-traffic restrooms and households alike
Who this is for
- Bunn Axiom owners experiencing slow brewing or inconsistent coffee temperature.
- Home coffee enthusiasts who want to maintain their equipment for the best brew quality.
- Anyone looking to extend the lifespan of their Bunn Axiom coffee maker and prevent costly repairs.
What to check first
Brewer type and filter type
Before you begin deliming, identify your specific Bunn Axiom model. While the general process is similar, there might be subtle differences in reservoir size or specific steps. Also, remove any paper filters or permanent filter baskets from the brew funnel before deliming. These are not meant to be delimed and can become damaged or interfere with the process.
Water quality and temperature
Hard water, rich in minerals like calcium and magnesium, is the primary cause of scale buildup. If you live in an area with hard water, you’ll need to delime more frequently. While water temperature isn’t directly related to deliming, ensuring your brewer is completely cool before starting is crucial for safety and effectiveness.
Grind size and coffee freshness
While not directly related to the deliming process itself, an incorrect grind size or stale coffee can also lead to poor-tasting coffee, sometimes mimicking issues caused by scale. After deliming, if you still experience taste issues, re-evaluate your grind and coffee freshness. For optimal results, use freshly ground beans and a grind size appropriate for your brewing method.
Coffee-to-water ratio
An incorrect coffee-to-water ratio can result in weak or overly strong coffee, regardless of your brewer’s cleanliness. While deliming focuses on machine maintenance, always ensure you’re using the recommended ratio for your Bunn Axiom (typically 2 tablespoons of ground coffee per 6 ounces of water) for the best flavor extraction.
Cleanliness/descale status
If your Bunn Axiom is brewing slowly, making unusual noises, or your coffee tastes off, it’s a strong indicator that mineral buildup is affecting its performance. Regular cleaning of the brew funnel and spray head is important, but deliming addresses the internal components where scale accumulates. Check your last deliming date; if it’s been more than 3-6 months, it’s likely time for a refresh.
Step-by-step: How to delime a Bunn Axiom coffee maker
This guide assumes you are using a commercial deliming solution designed for coffee makers. Always refer to your specific Bunn Axiom manual for exact instructions.
1. Prepare the brewer: Unplug your Bunn Axiom coffee maker from the power outlet and allow it to cool completely.
- What “good” looks like: The brewer is cold to the touch, and there’s no risk of hot water or steam burns.
- Common mistake and how to avoid it: Trying to delime a hot brewer can lead to burns and can be less effective as the solution might evaporate too quickly. Always wait for it to cool down.
2. Remove accessories: Take out the brew funnel, spray head, and any other removable components. Discard any paper filters.
- What “good” looks like: The internal brewing path is clear of obstructions, allowing the deliming solution to circulate freely.
- Common mistake and how to avoid it: Leaving a paper filter in can cause it to disintegrate and clog the system. Ensure all filters and removable parts are out.
3. Prepare the deliming solution: Follow the instructions on your chosen commercial deliming product. This usually involves mixing it with a specific amount of water.
- What “good” looks like: The solution is correctly diluted according to the manufacturer’s guidelines, ensuring effectiveness without being overly concentrated.
- Common mistake and how to avoid it: Using too much or too little solution can either damage the machine or be ineffective. Always measure precisely.
4. Add solution to the reservoir: Pour the prepared deliming solution into the brewer’s water reservoir.
- What “good” looks like: The solution is safely contained within the reservoir, ready to be heated and circulated.
- Common mistake and how to avoid it: Overfilling the reservoir can cause spills when the heating element activates. Fill to the recommended level.
5. Initiate a brew cycle (without coffee): Plug the brewer back in. Place an empty carafe on the warming plate. Start a brew cycle as if you were making coffee, but without any grounds.
- What “good” looks like: The deliming solution is heated and dispensed through the spray head and brew funnel, simulating a normal brew.
- Common mistake and how to avoid it: Forgetting to place a carafe will result in the solution overflowing onto your countertop. Always have a carafe ready.
6. Allow the solution to sit: Once the cycle is complete, turn off the brewer and let the deliming solution sit in the internal tank for 30-60 minutes. Check your deliming solution’s instructions for specific times.
- What “good” looks like: The solution has sufficient contact time with the mineral deposits to break them down effectively.
- Common mistake and how to avoid it: Not allowing enough soak time will result in incomplete descaling. Be patient for the recommended duration.
7. Drain and rinse: Empty the carafe and discard the used deliming solution. Rinse the carafe thoroughly with clean water.
- What “good” looks like: All the acidic solution and dissolved mineral residue are removed from the carafe.
- Common mistake and how to avoid it: Not rinsing properly can leave a chemical taste in your subsequent coffee. Rinse multiple times.
8. Flush with clean water (multiple times): Fill the reservoir with fresh, clean water. Run several full brew cycles (at least 3-4, or more if recommended by your manual) with just water, discarding the water after each cycle.
- What “good” looks like: The internal system is completely flushed, with no residual taste or smell from the deliming solution. The water should run clear and clean.
- Common mistake and how to avoid it: Insufficient flushing will leave a chemical taste in your coffee. Run extra cycles until you’re confident all residue is gone.
9. Clean removable parts: While the brewer is flushing, clean the brew funnel and spray head with warm, soapy water.
- What “good” looks like: All coffee oils and residues are removed from these components.
- Common mistake and how to avoid it: Neglecting these parts means you’re only half-cleaning your machine. Keep them spotless.
10. Reassemble and test: Once all parts are clean and the system is thoroughly flushed, reassemble your Bunn Axiom. Brew a test batch of coffee to ensure normal operation and taste.
- What “good” looks like: The brewer operates smoothly, and your coffee tastes clean and delicious, free from any off-flavors.
- Common mistake and how to avoid it: Skipping the test brew means you won’t immediately know if the deliming was successful or if any residue remains.
Common mistakes (and what happens if you ignore them)
| Mistake | What it causes | Fix |
| :———————————- | :——————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————————–. Will be
The Bunn Axiom series of commercial coffee brewers are known for their reliability and ability to brew a consistent cup. However, like any coffee maker, they require regular maintenance, including deliming, especially in areas with hard water. Mineral buildup (limescale) can significantly impact your coffee’s taste, slow down the brewing process, and eventually damage the heating element and internal components.
This guide will walk you through the process of deliming your Bunn Axiom coffee maker, helping you maintain its performance and ensure you continue to enjoy great-tasting coffee.
This guide will walk you through the process of deliming your Bunn Axiom coffee maker, helping you maintain its performance and ensure you continue to enjoy great-tasting coffee.
- BUNN BREWS DIFFERENTLY - The BUNN Speed Brew uses an internal commercial grade stainless steel hot water tank that keeps 70oz of water always hot so you can quickly brew at the flip of a lid.
- CLASSIC SPEED BREW look with a stainless-steel faceplate and tank wrap design.
- DESIGNED AND ASSEMBLED in the USA.
- EXCLUSIVE DRIP-FREE CARAFE delivers the cleanest pour on the market with a proprietary lid and spout design that arcs the coffee into the cup and wicks the rest back into the carafe.
- SWITCH ACTIVATED warmer plate keeps your coffee at optimal serving temperature.
Quick answer
- Regular deliming prevents mineral buildup, ensuring optimal performance and taste.
- Use a commercial deliming solution or white vinegar, but never mix them.
- Always unplug the brewer and allow it to cool completely before starting the deliming process.
- Follow the manufacturer’s instructions for your specific Bunn Axiom model.
- Flush the system thoroughly with clean water after deliming to remove all residue.
- Delime every 3-6 months, or more often in areas with hard water.
- Ignoring deliming can lead to slow brewing, poor taste, and premature failure.
Who this is for
- Bunn Axiom owners experiencing slow brewing or inconsistent coffee temperature.
- Home coffee enthusiasts who want to maintain their equipment for the best brew quality.
- Anyone looking to extend the lifespan of their Bunn Axiom coffee maker and prevent costly repairs.
What to check first
Brewer type and filter type
Before you begin deliming, identify your specific Bunn Axiom model. While the general process is similar, there might be subtle differences in reservoir size or specific steps. Always consult your owner’s manual for model-specific instructions. Also, remove any paper filters or permanent filter baskets from the brew funnel before deliming. These are not meant to be delimed and can become damaged or interfere with the process.
Water quality and temperature
Hard water, rich in minerals like calcium and magnesium, is the primary cause of scale buildup. If you live in an area with hard water, you’ll need to delime more frequently. Using filtered water can help reduce the frequency, but won’t eliminate the need for deliming entirely. While water temperature isn’t directly related to deliming, ensuring your brewer is completely cool before starting
