Coffee not hot enough

Check bunn.com for a free download of manual with maintenance instructions.
* In general;
-Keep the area clean by wiping down with a damp clean cloth.
-Remove the brew funnel and wipe spray head of coffee and grit.
-Wash the brew funnel after each use.
-Dump out old coffee and wash pots after closing. Heavy coffee stained pots can be filled with plain water and soak over nite. Rinse clean before using.
-For extreme caked on dried coffee pots; fill with hot water and leave on warmer over nite. Ask vendor for URN cleaner and add a tablespoon in pot with hot water. Let sit over nite on warmer plate. Rinse clean prior to use.
-Check if everything is working properly. Better to call and leave a message for service.
* when in doubt, call vendor for service.
Aloha, ukeboy57

The manual for this coffee maker can be found at this link:
http://manualheaven.com/assets/bunn-nhbx-b-contemporary-coffee-maker-manual.pdf
While the manual does not contain repair instructions, it does have some troubleshooting tips to follow if your coffee is not staying hot.

Plug in brewer and turn on vacation switch on side

of brewer. Allow 15 minutes for water to heat to proper

temperature. This is a quote from bunns troubleshooting page. Also it should be under warranty in which case you could go to www.bunn.com and call their service line and either have them send a tech to look at it or have you send it off for warranty repair. Hope this helps.

www.midstatebeverage.com  

While this brewer does have a reservoir that keeps a couple of pots worth of water hot for brewing you can get a cooler second pot if you brew directly after. You should hear the brewer heating up after brewing. Try waiting until it is back to temperature before re-brewing. If that heating takes more than a few (3-4) minutes then you probably have a problem with the heating element and the water is only being heated by the "keep warm" heater.

The brewer has not had enough time to reach its operating temp (usually 7 mins after a brew cycle). If that is not hte case then the machine needs to be descaled.

You may not have enough water in the tank.
Follow these steps

1. With the coffee pot unplugged, fill your resevoir/tank until water begins pouring out of your sprayhead and brew basket.
2. Wait for the water to finish dripping then plug in your Bunn.
3. Let your Bunn warm up for at least 8 minutes.
4. Run a test cycle with clean water, remembering to use the water pitcher provided for this purpose, while leaving your empty pot on the burner beneath the brew basket.
5. If your cycle completed, and your coffee pot is filled to the desired level you are ready to make coffee.

Remember that these Bunn models have no water filter installed, so, the cleaner the water the better tasting the coffee.

Make sure you are using the type of commercial coffee pot like the one in the picture. They don't have to have to be plastic with the metal bottom, they can be all glass. The commercial pots are heavy duty and usually disperse the heat well.

If you are using commercial pots the only solution without replacing the warmers is to put three pennies on the warmer and to put the pot on top of them. The pennies will get hot so don't forget and grab them but the pennies help to move the pot just a little way away from the direct heat.

You can either replace the warming element with a new one, or some people put 3 or 4 pennies on the top of the warmer tray. Don't laugh- this really does work!

Try connecting two elements in series. See if this keeps it hot enough. (One switch controlling both burners.) See if another brand of burner will fit in the hole. Check to see if the wattage is lower.

the coffee maker brews but the pot warming plate isn't hot