Bunn Home Coffee Equipment FAQs

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Bunn Home Coffee Equipment FAQs

1. Can I purchase an internal replacement part?

For your safety, under UL requirements, internal parts can only be installed by factory-trained personnel.

Bunn 3 Year Warranty

While Bunn warranties its home coffee makers for 3 years, Bunn does not sell every internal replacement part. This is necessary in order to maintain the UL (Underwriters Laboratory) product qualification listing for these home coffee makers.

The only replacement parts that are generally available for home coffee makers are the external parts & accessories...

1. the coffee decanter
2. the filter basket
3. the plastic water pitcher
4. the sprayhead
5. the deliming spring

Bunn Home Products - Parts - Supplies - Accessories

Bunn Drip Free Carafe (Replaces NCD)

Bunn Drip-Free Coffee Pot

Bunn Home and Commercial Filter Baskets

Bunn Home Plastic Filter Basket



Bunn BTC Thermal Carafe



Bunn NHBX/NHS Accessory Kit (discontinued)



Bunn Home Deliming Spring
& Sprayhead Kit



Bunn 10 Cup Plastic Water Pitcher

If your coffee maker is still under warranty, send us an email and we'll get you the info you need to get your coffee maker repaired or replaced.

2. What might cause my Bunn Coffee Maker to leak?

Leaking can be the result of one or more of the following causes:

 Improper maintenance or care.
 Normal wear and tear.
 Deterioration of seals or gaskets within your brewer that naturally occurs over time.
 Accumulation of mineral deposits from your water. Clean your brewer with a good de-scaler regularly.

Use a deliming spring to clean mineral deposits out of your Bunn coffee maker.

3. Why do I get grounds in my coffee (why does my funnel overflow?)

 You could be using the wrong filter. Our coffee filters are designed to specifically fit all Bunn Home Coffee Makers;
other filters may cause problems.
 Softened water and/or decaffeinated coffee can cause brew funnel overflow.
 The sprayhead may be missing from your coffee brewer.

4. I live at a high altitude. Can I use a BUNN brewer?

Yes. BUNN makes models for use at high altitudes (over 5,000 feet).

 BX-B Black High Altitude

 BX-W White High Altitude

5. Can I use the BTC (stainless steel carafe) on any BUNN brewer?

No, the BTC can only be used with the BTX ThermoFresh Coffee Brewer.

6. When I pour in a container of water, I don't get a full pot of coffee?

 Water adsorbs on the coffee grounds and coffee filter.
 If the brewer has not been used for several days or you have brewed several partial pots of coffee, some water will have evaporated and you will have to replenish the water supply with a pitcher of water.

7. Why does my coffee brewer make loud rumbling noises?

When the water is being heated to the proper temperature, it can make gurgling or boiling sounds. If these sounds are getting louder, there may be a mineral deposit buildup. To prevent this, please look in your manual to see how to clean your brewer regularly to keep it free from calcium (lime) deposits. You can de-lime your machine with vinegar, but we've had better luck with dezcal food-safe descaler

8. How do I drain my coffee brewer?

a.  Unplug the brewer, place an empty decanter on the warmer plate and pour a pitcher of cold water through to lower the water temperature.
b.  Remove the glass decanter and filter basket from the coffee brewer.
c.  Remove the sprayhead (the round disk above the brew funnel) by turning counter-clockwise.
d.  Grasp the brewer and quickly turn it upside down over a sink. Most of the water in the tank will flow from the sprayhead opening but some water may flow from the area around the top lid. Continue tipping the brewer until the flow of water ceases.
e.  Reinstall the sprayhead when all of the water has drained from the brewer. Securely tighten it by turning clockwise.
f.  DO NOT plug in until you repeat brewer start-up procedures from number 12 below.

9. Is it safe to leave my coffee brewer plugged in at all times?

Yes. This brewer has a specially designed tank to keep the water at the proper temperature. The constant supply of hot water assures the correct method of brewing in less than three minutes.

10. What if I don't plan to use the brewer for several days?

If you won't be using your brewer for several days, you can position the main power switch (on the side) to "off". This will completely shut off the brewer.

11. Why is my coffee dripping out very slowly?

 The sprayhead may be clogged. Check the round disk (sprayhead) above the coffee filter basket. The holes in this part must always remain open. If they are clogged, remove the sprayhead and clear the holes using a toothpick. Always unplug the brewer before deliming or cleaning the sprayhead.

 The brewer could be clogged with mineral deposits. Use your cleaning tool (deliming spring) and follow the procedures described in the operating manual.

12. When I first set up my coffee brewer, why doesn't coffee come out?

Before plugging in the brewer the first time, please do the following:

BX/GRX/NHBX/NHS Decanter Models

Step 1. Raise the hinged flip-lid (sliding lid for NHBX/NHS). Note: The post protruding from the screen is connected to a stopper that controls the flow of water into the tank. When lid is closed and the post is depressed, the stopper will be raised and water will flow into the tank.

Step 2. Slide an empty brew funnel into the brewer under the warmer switch. Pour one decanter full of water into the screened area on top of the brewer. Place decanter on the warmer. Close lid. Wait three minutes to allow the water to flow into the tank. Repeat this process. When the tank is full, some water will flow through the funnel and into the decanter.

Step 3. Plug in the brewer.

Step 4. Press the bottom of the vacation switch, located on the lower left side of the brewer, to the "ON" (lower) position. The vacation switch controls power to the tank heater. Initially you will have to wait approximately 15 minutes for the water to reach brew temperature.

Step 5. Empty any water that has collected in the decanter.

BTX Thermal Carafe Model

Step 1. Raise the hinged flip-lid. Note: The post protruding from the screen is connected to a stopper that controls the flow of water into the tank. When lid is closed and the post is depressed, the stopper will be raised and water will flow into the tank.

Step 2. Slide an empty brew funnel into the brewer. Pour one carafe full of water into the screened area on top of the brewer (there is no need to have the lid on the carafe at this time). Place carafe in position on the brewer. Close lid. Wait three minutes to allow the water to flow into the tank. Repeat this process. When the tank is full, some water will flow through the funnel and into the carafe. Leave the carafe in place.

Step 3. Plug in the brewer.

Step 4. Press the bottom of the vacation switch, located on the lower left side of the brewer, to the "ON" (lower) position. The vacation switch controls power to the tank heater. Initially you will have to wait approximately 15 minutes for the water to reach brew temperature.

Step 5. Empty any water that has collected in the carafe.

13. Why does my coffee taste weak or bitter?

The taste of your coffee can be caused by all or any combination of the following:

 Variation in the mineral or chemical content of the water (For example high sulfur content water will carry a strong taste).

 Variation in brands, mixes, quantity, or quality of coffee.

 Old or improperly stored coffee can easily taste stale. Ground coffee should be stored in a refrigerator in a sealed container.

 Size of the coffee grind affects the ability of the brewer to extract the oils that add flavor to your coffee.

 Missing sprayhead. If the sprayhead is missing the grounds will not be soaked properly.

 Check out our brewing hints for more information.

14. How can I brew the best tasting coffee with my BUNN brewer?

You'll have a great coffee experience if you follow these tips:

 Always start with clean equipment.

 Use fresh, cold, filtered water when you brew.

 Use our coffee filters for proper extraction. Other filter types may not work as well.

 Use the right amount of coffee. Our All Day Gourmet Coffee is perfect for home use.

 Optionally, transfer coffee to an airpot - keeps coffee fresher.

 For the freshest flavor, don't keep brewed coffee longer than one hour.

 For more brewing information, see our brewing hints.

15. Can I pour cold coffee back into the reservoir to reheat it?

This is not recommended since it can cause damage to your coffee brewer.

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