How do i repair the water leak in my model nhbx-b bunn coffee brewer?

you could remove the cover and look for the connection that isn't connected properly - - be careful not to touch electrical connections/bare wires when cover is off - or take it to a technician - or contact Bunn directly for suggestions.

regards,

This is a home model pour over. Overfilling is the most common cause of leakage as there is no plumbed in water line. You should only pour in the amount indicated on the decanter. If it is overflowing, check if you have the right decanter as someone may have used an old pot from a larger brewer. Say there was a 12 cup pot around and now you have a 10 cup brewer.
* carefully pour water to the inner fill line. You will probably see a ledge or spill off hole on the inside of the fill tank. Some units will spill out the back, others may spill back into the drip funnel. Note at what point you get near the spill level and note how much is left in the decanter. The amount left is your over flow.
* If you want more accuracy then use a measuring cup and count how many cups are needed to fill the brewer.
* Unplug any brewer that has water coming from the base. Dry up the area and drain the brewer. Dry off and let sit to completely dry out. Refill, note any leaks? If okay then plug in and brew as normal.
* still having problems? Contact your vendor for service.,
Aloha, ukeboy57

lift filler led and remove 2screws on top of reservoir
Then remove 4 screws that hold the reservoir on an you should be able to lift it off

Your brewer is still under the warranty. If you will call 800-352-2866 with the model and code date, we will send you out a new machine.

I work for BUNN. Here's a link to the manual for your NHBX-B
http://www.bunn.com/pdfs/retail/usecare/41756.0000_STX_NBX_U_C_English.pdf

I have the same problem and I took the coffee maker apart to find out why. It has to do with a leak on a fitting. On mine I found that the fitting where the hole in the black plastic that the water flows through to get into the stainless steel tank needed to be repaired with some silicone sealant to fix the leak. Still making some coffee!

there's probably a 'silicon rubber' hose that feeds hot water to the 'grounds basket'- it may be loose, or damaged. is it leaking water, or coffee?? we have a bunn 8-cup, which has a pre-heated water tank that brews a pot in about 3 min. energy waster, but when you need coffee, you need coffee!!! is your filter holder properly centered? is the carafe lid hole clean and un-obstructed?
if it's leaking water, and not too costly to replace- you may consider replacing it with a new one!
good luck!

before plugging in place your empty filter basket in the coffee maker and place a pot under it. Slowly pour in two pots of water using the pour pitcher. Now you can plug it in. it'll take 15 min to heat up first time . when you brew your first pot leave your water level a little short,because the water will expand (only the first time)

The silicon seal inside the coffee maker tends to disintergrate. Bunn Inc. does not sell parts for the inside of the coffee makers, but a seal kit can be purchased through a small appliance repair center or repaired for a small cost. Kit is about $8.00 at most places.