Question about Bunn NHB Coffee Maker

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Cracked plastic It looks like the plastic in the water reservoir is on our Bunn NHB coffee maker has a crack in it. I would prefer to buy a replacement and install it myself as to not having my coffee maker. Could this crack be causing a water leak? Can it be replaced? Help! Thank you, Rob

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  • jcsalen Feb 22, 2009

    I have a cracked resevoir in my GRX-W bunn coffee pot.CanI buy a replacement resevoir for it?

  • josephcoombs May 09, 2009

    On my Tassimo the plastic water container has broken plastic at the float, so the float just floats out, do they not do replacements

  • lulubee May 23, 2009

    Same problem here. The plastic reservoir has a crack and leaks water everywhere. Had this machine for 11 months now. I can't quite figure out how I cracked it as the dern thing is never moved.


    I'm calling BUNN to see what options I have.

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Yes- this is a very common problem with the Bunn home coffee brewers. However, there are no replacement parts available. Your only hope to get a replacement pour-in tray is to get ahold of yopur local Bunn repair center and see if they have a machine that broke down for some other reason and rob the tray from that. You can get a list of Repair centers in your area from www.bunn.com

Posted on Feb 12, 2009

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How to fix a leak on a bunn NHBX coffee maker


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.

Aug 09, 2014 | Bunn NHB Coffee Maker

1 Answer

Bunn nhb disassemble


Most likely is that the seal between the water reservoir and the tank is leaking. Not uncommon. If you can find a replacement seal go for it, otherwise the old one can be made serviceable by coating both sides with a thin bead or layer of clear silicone. Allow to cure for 24 hours before powering the coffee maker back up.

Apr 23, 2014 | Bunn NHB Coffee Maker

2 Answers

I have had my Bunn for 5 years and have loved the convenience of the 3 minute coffee, plus the coffee is always great, but for the last 6-8 months it has been leaking from the bottom. I go to work very...


Most likely the problem is in the water intake area. I have the same problem, I took my machine apart, removing the top revealed a plastic water chamber which leads to a connector that lets the water go into the heating chamber. The seal had become brittle, and the plastic water chamber also was degenerating where it met the heated water chamber. I replaced the rubber seal and that worked the first time, however, I think the plastic has now deteriorated to the point that I will need a new reservoir piece and a new seal. It's probably time to send in the unit for repair.
I think one repair for a 25-30 year old coffee maker sin't such a bad deal!

Feb 14, 2010 | Bunn NHB Coffee Maker

1 Answer

Not all water comes through filter


2 cups white vinegar in reservoir, run full cycle, let cool, discard vinegar. Fill reservoir with cold water, run full cycle, discard water, let cool. Repeat clear water cycle.

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1 Answer

The bunn nhb developed cracks in the area where the coffee tray slides in andleaks water when brewing


Please call customer service with the model and date code and we will be happy to assist you with this issue.

Sep 27, 2009 | Bunn NHB Coffee Maker

1 Answer

The Bunn CW Series overflows the pot. How canwe


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.

Aug 14, 2009 | Bunn NHB Coffee Maker

2 Answers

Bunn Coffee Pot Leaks Water


I obtained Bunn washer seal repair kit from buy-it-now-store.com for $6 plus $7 S&H and it solved the problem.

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2 Answers

Bunn (Pour Omatic) coffee maker has been leaking water - what would couse it to leak? Thank you


When a machine leaks, it is generally an indication of a bad seal or gasket. If you will call Customer Service at 800-352-2866 with the model and date code we will be happy to help you resolve your issue.

Oct 28, 2008 | Bunn NHB Coffee Maker

1 Answer

Bunn coffee drips slow


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.

Apr 05, 2008 | Bunn NHB Coffee Maker

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