Top 10 Bunn NHB Coffee Maker Questions & Answers

My warm indicator light is not working. Only used less than a month.

I had the same issue, poured in 8 and out came 6. Here's what I did to clean and fix.
1) Unplug the NHB
2) Remove accessories like the pot and basket
3) Bring NHB over to the sink
4) Snap off the entire top cover (not the swing lid) by starting at the front and lifting upward (the top cover is about 1/4" thick). The back of the top cover will pivot a bit and then pop off exposing the pour reservoir. Remove the flow stopper inside the pour reservoir by lifting it straight up.
5) Place the top cover and flow stopper aside.
6) Remove the brew diffuser (located underneath the top where the brew basket goes. Twist counterclockwise gently but forcefully enough to snap it past the lock tabs which hold it in place. You'll know that it you've done this correctly when it just falls out.
7) Still over the sink, tip the NHB in a fashion where the back side is facing upward and the brew side is facing down into the sink. You'll be holding the NHB horizontally by the top and bottom of the unit. This will allow any water in the tank to pour out the brew spout. Begin to tip the unit as if tipping upside down as this will allow any remaining water to drain out. If this does not work the brew spout hose may be clogged and you can just tip the unit entirely upside down to empty it from the fill hole in the pour reservoir.
8) Return the NHB to the upright position in the sink.
9) Using a scotch brite sponge and some baking soda, clean the inside of the pour reservoir and rinse.
10) Using the tool Bunn provided, clean out the brew spout hose which is located under the brew hat. This is the little hole where the water comes out. If you don't have the tool Bunn provided you could use something like a plastic tie-wrap. Don't use anything metal as the hose you're cleaning is made of plastic tube and could become punctured. Clean this hose for just a minute or two to ensure that there are no significant obstructions.
11) With the NHB upright in the sink, pour a slow stream of hot water from the faucet, about two cups, directly into the fill hole located in the pour reservoir.
12) Tip the unit horizontally, as in step 7, and place the tip of your finger over the pour reservoir fill hole covering it completely.
13) Shake the unit back and forth horizontally so the water in the tank splashes around and frees anything which may be built up in the tank. Some water may splash out of the brew spout hose.
14) Tip the unit as in step 7 to drain the tank water out.
15) Fill a 16 ounce glass with hot water and 2tbsp baking soda, mix and pour into the pour reservoir fill hole.
16) Repeat steps 13 and 14 once.
17) Repeat steps 11 through 14 three times.
18) Clean the pour reservoir cover, swing lid and flow stopper.
19) Put the flow stopper back in place.
20) Attach the top cover.
21) Clean the exterior of the NHB.
22) With the boil and warmer switches off, plug the NHB into the electrical outlet.
23) Turn the boil and warmer plate switches on.
24) Fill the NHB with one pot of cold water and close the swing lid. Wait one minute.
25) Fill the NHB with another pot of cold water. Place the pot on the warmer plate and close the swing lid. If water does not yet come out, fill with one more pot of water.
26) Allow water to drain from brew spout until it stops draining.
27) Empty pot.
28) Fill pot to 10 cup line and pour into the NHB. You should find that the NHB now delivers 10 cups back to the pot. Empty the pot.
29) Clean brew spout diffuser and replace back in the brew hat.
30) Clean the pot, pot lid and brew basket.
31) Wait ten minutes for the water in the tank to boil.
32) Brew your coffee as you normally would.

The only issue I experienced during this process was with the warmer plate switch. It appeared that the light in the switch blew although the warmer plate still warmed normally. Shortly after the water in the tank started boiling the warmer switch light started operating again.

My coffee maker is about 15 years old. The on and off switch works but the light does not. Is there a way to replace the bulb.
Than You
Judith 54

Open the front panel, there is a set of instructions on it, you will have to make sure the board is set to program and not lock, before you adjust.

Make sure vacation switch is turned on (preheats water).

See manual here:

http://www.bunnomatic.com/pdfs/retail/usecare/41756.0000_STX_NBX_U_C_English.pdf

I work for BUNN. Replacement parts for electrical components are not available, but your brewer has a 3-year warranty. Our customer service team can help you determine the best solution. You can contact them at 1-800-352-2866 or thru our on-line service form http://www.bunn.com/retail/service/service_form.html

The vacation switch should be in the "I" position and the "O" should be in the up position and you will see orange around the switch. If this does not correct the issue, then please call 800-352-2866 for further assistance.

Every time I plug in my bunn coffee maker, it trips the GFI. But when I plug it into another plug in my kitchen, it will work, but it seems like the water reserve is not right. It blows too much steam and the top starts lifting up from the pressure of the steam, then it starts leaking out the top left side. Then if I pour enough water to make 10 cups, it only makes 6 or 8. The coffee maker is only 3 years old, what should I do?

Ours was leaking as well.

Unplug the machine first. The entire top just snaps off in one piece. When you have this off, gently snap out the pivoting arm you are looking at that has a clear silicone cover over the drain to the tank. This needs to be cleaned along with the top resevour. Remove the brew basket (where you place the filter). Tip the unit upside down and drain the water. Unscrew the spray nozzle. There are two Phillips screws that need to come out. Remove them and then gently pry off the bottom section as well. It pivots from the back.The on/off switch will probably come out of it\'s mounting when you do this so take a good look at how it\'s placed so you can snap it back in when you go to reassemble the unit. The stainless steel band around the top of the unit will probably come off at some point during dis-assembly. This is just for looks so if you don\'t want to bother with the hassle of getting it back in place, don\'t worry about it.

There is a silicone tube that attaches the bottom to the top. Pull this off for cleaning.

Clean everything you see with white vinegar. Do a good job, soaking the tube, flapper, spray nozzle etc. If you saved the package that came with it when you bought the unit, there is a long, thin brush for cleaning the drain tube. If you don\'t have that anymore, pipe cleaners will work but be careful you don\'t poke a hole in the silicone tube.

Leave the pivoting arm off the top of the fill tank and fill everything with white vinegar and let it soak. Dump it out and be amazed at all the crap that comes out. Do this a couple of times until nothing more comes out. Reassemble the entire unit making sure you get the silicone tube securely in place. This is a pain but take your time and do it right or it will leak. Fill everything with water and run it for a few cycles until it is flushed out. About once a month or so, dump out all the water and fill the tank with white vinegar, let it soak and then run a brew cycle with vinegar instead of water. Flush as above.

The siphon, drain tube and spray nozzle get clogged with calcium and this is what causes the leaks.

The leak is most likely between the water reservoir and the tank. Bunn uses a soft silicone seal for that connection that gets compressed over time and starts to leak water whenever you make a pot of coffee.

It's planned obsolescence. Bunn won't sell you a new seal. So you have to improvise. But it's simple enough to do.

Remove the top cover and the plastic water reservoir right below it. Don't tamper with the little valve that opens when you close the lid.

Look for the seal. It could be stuck to the bottom of the reservoir, or sitting loosely on top of the metal tank. Make sure to preserve its top-to-bottom orientation (don't put it back in upside down).

Apply a narrow bead of clear silicone into the grooved side of the seal. Press the seal gently onto the reservoir, then apply a thin layer to the smooth side.

Re-install the reservoir and reassemble the unit.