FAQs about BUNN Home Brewers
Brewing delicious coffee in a BUNN Home Brewer is unlike using any other home coffee machine. We've done our best to anticipate questions you might have, but you are welcome to call 908-393-4379 for more information. |
Frequently Asked Questions
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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: B, GR, and NHB 10-Cup Models
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, 4 to 6 cups of 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. B8 and GR8 8-Cup Models
Step 2. Slide an empty brew funnel into the brewer under the warmer switch. Pour one pitcher of water (filled to the 48 oz. line) into the screened area on top of the brewer. Wait two minutes to allow the water to fill the tank. Pour a second pitcher of water into the brewer. When the tank is full, 4 to 6 cups of water will flow through the funnel and into the decanter. Step 3. Close the lid and 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" position. The vacation switch controls power to the tank heater. Initially you will have to wait approximately 15 minutes in FORM for the water to reach brew temperature. Step 5. Empty any water that has collected in the decanter. BT10 Model
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. |
When I pour in a container of water, I don't get a full pot of coffee?
Water absorbs into the coffee grounds and coffee filter. If the brewer has not been used for several days or if you have brewed several partial pots of coffee, some water will have evaporated and you will have to replenish the water supply by pouring more water into the brewer. |
Why is my coffee dripping out very slowly?
The sprayhead may be clogged. Check the round disk (sprayhead) above the brew funnel. 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.
How to delime your brewer
Step 1. Remove the sprayhead by turning it with your fingertips and set it aside. Step 2. Insert all but two (2) inches of the flexible deliming tool (supplied) into the sprayhead tube. Step 3. Slide the tool in and out five (5) or six (6) times to loosen lime in the sprayhead tube. (You may need to twist, push and use some force when inserting the tool.) Remove the tool. Step 4. Prior to replacing sprayhead, pour one decanter of fresh water into the brewer, position the empty decanter on the brewer, and close the lid. Step 5. Check the holes of the sprayhead. If plugged with lime, they may be cleared by using a toothpick. Clean the sprayhead with a cloth and mild detergent. Rinse the sprayhead with water, then reinstall. Step 6. Plug in the brewer and allow the water in the tank to reheat before using (approximately 15 minutes). NOTE: The frequency of deliming depends on the mineral content of your water. |
Why does my coffee taste weak or bitter?
The taste of your coffee can be caused by all or any combination of the following:
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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. |
Why do I get grounds in my coffee (why does my funnel overflow?)
You could be using the wrong filter. BUNN coffee filters are designed to specifically fit our brewers; others may cause problems.
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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 follow these steps.
How do I clean my brewer?
Step 1. Slide an empty brew funnel into the brewer under the sprayhead and center an empty decanter on the base plate. Step 2. Open the lid and pour one quart of white vinegar into the top of the brewer; close the lid. Empty the decanter when liquid stops flowing from the funnel. Step 3. Allow the brewer to sit for two hours. Step 4. Unplug the brewer. Remove the brew funnel and sprayhead from the brewer and set them aside. Clean the sprayhead with a cloth and mild detergent. Step 5. To drain the brewer, continue to Step 6, OR to clear vinegar out of brewer without draining, pour a decanter of fresh, cold water through the brewer. Position decanter on warmer, then close the lid to allow the water to run through the brewer. After it has run through, empty decanter, and repeat the process approximately 8 - 10 times. Proceed to Step 9. Step 6. Cool the brewer by pouring a full decanter of fresh, cold water into the top of the brewer. Place decanter on the base plate and close the lid. When water has stopped flowing from the brewer, empty the decanter. Repeat this process and set the decanter aside. Step 7. Grasp the back of the brewer and carefully turn it upside down over a sink as shown. Most of the water in the tank will flow from the sprayhead tube opening. Some water may flow from the area around the top lid. Continue tipping the brewer until the flow stops. Step 8. Replace the sprayhead and funnel after the water has been drained. Pour a decanter of water into the top of the brewer. Place the decanter on the base plate; close the lid. Repeat this process with another decanter of water. Water will flow out of the funnel after the second decanter. When flow from the funnel has stopped, empty the decanter and pour an additional decanter of water into the brewer. Place the decanter on the base plate and close the lid. Step 9. If you have not replaced the sprayhead and funnel, do so now before proceeding. Taste the water coming out of the brewer. Pour additional decanters of fresh, cold water into the brewer as needed until the water has no vinegar taste. Step 10. Plug in the brewer and allow the water in the tank to reach brewing temperature before using (approximately 15 minutes). |
How do I drain my coffee brewer?
Unplug the brewer, place an empty decanter on the warmer plate and pour cold water through to lower the water temperature. Wait 15 minutes for brewer to cool. Remove the glass decanter and filter basket from the coffee brewer. Remove the sprayhead (the round disk above the brew funnel) by turning counterclockwise. Grasp the brewer and carefully 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. Reinstall the sprayhead when all of the water has drained from the brewer. Securely tighten it by turning clockwise. DO NOT plug in until you repeat Initial Brewer Set-Up Instructions. |
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. |
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. |
Can I purchase an internal replacement part?
For your safety, under UL requirements, internal parts can only be installed by factory trained personnel. Seals, gaskets, warmer plates, and warmer plate switches are the only repairable parts. To ask a service-related question, use the form in the "Parts and Services" area of this website or call 908-393-4379. |
What might cause my coffeemaker to leak?
Leaking can be the result of one or more of the following causes:
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I need information regarding warranty, repair and exchange options.
To obtain more information, use the form in the "Parts and Services" area of this website or call 908-393-4379 to speak with a Customer Support representative. Please be prepared with the model name of your coffeemaker and the serial number located on the bottom of your unit. |
I live at a high altitude. Can I use a BUNN brewer?
Yes. BUNN makes models for altitudes of 4,000 ft. and above. The "D" in the model name indicates that it is for high altitude applications. |
How can I brew the best tasting coffee with my BUNN brewer?
BUNN recommends you DO:
BUNN recommends you DON'T:
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Can I use the BT stainless steel carafe on any BUNN brewer?
No, the stainless steel carafe can only be used with the BT10 Brewer. |
Why does my brewer leak water into the decanter overnight when the lid is left open?
Our 10-cup brewers (NHB, B10, GR10 and BT10) are not designed to hold water in the upper water basin for an extended period of time, such as overnight. |