Question about Bunn GR10 Coffee Maker

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I have a Bunn coffeemaker GRX - W Date Code 073207 I am in need of the small plastic tube that allows water to empty into the tank from the top fill. Can I purchase?

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I ditched it!

Posted on Jul 24, 2008


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Posted on Jan 02, 2017


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My bunn coffeemaker NHS-B trip the GFI. Where do I find the code date on my brewer?

The NHS-B has a semi-sealed tank that keeps +1 pot of water heated and ready to brew. Pouring in a full pot of cold water will fill the top tray and allow a slow trickle of cold water into the top which forces hot water to over flow into the brew basket. This continues until all the cold water drains into the heater tank. So the brew is matched volume per volume. UNLESS the thank was empty or not filled prior to brewing. Follow the brewing instructions from Bunn (on line for *FREE* download at
* If it leaks (from the bottom) only when you pour in water. Then your pouring it too fast and over flowing the fill tray. slowdown, watch the level in the tray. do not fill past the lid.
* If it leaks just sitting (not brewing) then there is a hole in the tank. Call for service.
* If it leaks after filling the tray half way. then the top of the tank has a leak, loose, cracked, or missing gasket. There is quite a few gaskets on the lid. Call for service.
* Final; Leaks are always bad around electrical equip. Best to unplug and call for service to be safe.
Aloha, ukeboy57

P.S. If you did splash too much water then wipe up as much as you can. Leave it out on a towel or paper towels to allow the excess moisture to evaporate. If you dump all the water out of the brewer (and tank) then you will need to pre-fill it with a pot of water PRIOR to plugging in the brewer. Follow the set up instructions in the manual. Let it heat up and try again. If it's still leaking then there is a hole in the tank. Call for service.

Dec 29, 2017 | Bunn Coffee Makers & Espresso Machines

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My model bunn grx-b stopped working. Checked continuity on tank, fuse on tank, bottom switch, can top switch be at fauLt? If so how do I remove it?

Bunn switches if the rocker style as the looks like will have two leaves on the side of the switch that will need to be squeezed in order to get it past the square hole. These can be really tight but if your sure it's at fault then just crush it to remove the pieces. The new on should snap in if the hole was not damaged.
* Since your checking the brewer you should get the manual that may be available from (I haven't checked for this model but they usually post the manuals)
* This seems to be a home version of a VPR commercial brewer (but nicer). So expect the same parts for the fuse, thermal fuse, thermal disk (or thermostat).
* Note: If your not familiar with Bunn brewers then make sure you look at every piece of wire as some high limit fuses are inside plastic tubing or heater braiding.
* Thermal disks look like a metal button with a ceramic cap or button attached to it. This can be a high limit (reset-able) or a thermostat. * It may have a standard thermostat with bulb but it may be a thermsistor probe with a PC board to control the brew heat.
* Final; this is the 3d question on this particular brewer. All have similar problems with heating. It's the same with VPR's. If I set them up I know it works properly. It's when someone moves them to another office that's the problem as they dump out the water prior to the move then plug it in without refilling the tank. Thermal fuse blows. There is a link below showing how to set up this brewer.
Aloha, ukeboy57

Dec 27, 2016 | Bunn Coffee Makers & Espresso Machines

1 Answer

I can do the vinegar thing but the cleaner thing is a piece of plastic. I just dont know how a piece of flat plastic is going to help.

Do you have the de-limer spring that came with the coffeemaker?

Sometimes you have to take the top off of the coffeemaker & run the spring down the entrance hole to clear lime obstruction from the tank fill tube.

There are 2 or 3 phillips-head screws that hold the top on. 2 are under the water reservoir fill cover, and a 3rd may be in on the middle -top towards the back. Depends on your exact model.

Once the top is off, you'll see a lever arm.that keeps the water from flowing down the fill tube while the reservoir cover is raised. To get access to the fill tube, you gently pop this out from the pivot point with some upward pressure, Run the de-liming spring down the tube a few times to make sure it's clear.

Reverse the above process to reassemble.

Be sure and remove & clean the spray head over the brew-basket after de-liming also. Sometimes chunks of minerals block the holes.

Feb 28, 2014 | Bunn Pour-Omatic Coffeemaker, 10 Cup White

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Have a bunn pour omatic home model older one great cleaned and started to leak. what is this called a small plastic insurt in lid that goes into the hole where the water runs into, the top part in lid...

It is part of the rocker arm. If you will call customer service with the model and date code, we will be able to help you resolve this problem. The number is 800-352-2866.

Oct 14, 2010 | Bunn Pour-Omatic Coffeemaker, 10 Cup White

2 Answers

My BUNN GRX-B is leaking water when brewing. I think it is out of the back?

Please get the date code located on the bottom of your brewer and contact customer service. The machine has a 3 year limited warranty and we can replace it free of charge. If it is over 3 years old, we will replace it at a reduced cost.

Dec 01, 2009 | Bunn GRX-B

1 Answer

I mislaid my instruction booklet, how do I clean my 10 cup home coffeemaker? Bunn coffeemaker purchased from Tim Horton's.

With your brewer still turned on and full of water, pour 1 quart of white vinegar into the top and place the decanter on the base and close the lid. Allow the vinegar to stay in there for 2 hours. Then you will need to flush out the machine with 8-10 decanters of water. There is a manual located on the website Select @ home then go to products. Select the model and then there is an option to download the manual. Or you can call customer service with the model and code date and a manual can be sent out to you.

Jun 29, 2009 | Bunn 10 Cup Home Coffee Brewer

2 Answers

Bunn Coffee machine only makes 1/2 pot

What's happening is that it isn't leaking, it's boiling over. You need to turn down the thermostat under the top lid. Also, before you brew coffee, add water to the tank and let it pour into an empty pot. Once it stops brewing, let it heat up for a few minutes then make your pot of coffee.

Jan 02, 2009 | Bunn Pour-Omatic Coffeemaker, 10 Cup White

2 Answers


The Bunn coffee machine has an internal tank used for holding approx three potfulls of water at just below brewing temperature. When you add water for a potful, the thermostat senses cold water and starts the brew heater. The water level inside the tank comes up and goes through the sprayhead. This "surge" of water, that you call drips is normal. The hot water stratifies to the top of the tank, just like an electric water tank in a house. The internal pot heater kicks in and boils the water already in the tank, raising the water level in the siphon pipe to the sprayhead until the reservoir under the add water opening is empty.

Sep 15, 2007 | Bunn NHB Coffee Maker

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