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Bunn Coffeemaker CWTF35-4


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Re: Bunn Coffeemaker CWTF35-4

Hook it up to cold water. It has a heating element in the tank that heats the water.

Posted on Jan 22, 2008

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My Bunn coffee maker just quit. No hot water, no brewing sounds, no heater. Is it the cord or is it just done? Help!

Unplugged, check the wire connections, heating element and thermostats
You need to have a volt meter for this job.

Jan 18, 2011 | Bunn Pour-Omatic Coffeemaker, 10 Cup White

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Hot water leaks out the bottom when filling resevior with water of my Bunn coffeemaker GR10-B

If you will call 800-352-2866 with the model and date code and we will be able to help you resolve your issue.

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Can i clean a Bunn coffeemaker with vinegar?

Sure, vinegar is a nice weak acid, no harm at all.

Oct 15, 2009 | Bunn NHB Coffee Maker

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Bad tasting coffee

you can always clean a coffeemaker with vinegar, but always pour in cold, so you can do it twice or more, but dont re-use the stuff you just used, wait till it's cold or just use some other.after use clean by let water through 2 or 3 times, (also only cold water)

Jan 28, 2009 | Bunn-O-Matic Coffee Brewer GRW8

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You can order a new heating element from the manufacture. But, the crimp connectors and the thermo-fuse may also have to be replaced. You will need the crimp tool for the crimp connectors. You will also need a meter to verify the connections.

If you take the unit to an appliance center they can service it for you. But, you may find the cost of the parts alone to not be feasible.

Jerry G.

Jan 07, 2009 | Bunn Pour-Omatic Coffeemaker, 10 Cup White

1 Answer

I lost my directions to my bunn coffeemaker. Can you tell me how to make the first cup of coffee in a bunn? Is there just one place to pour the water? Fo you leave it plugged in all the time?

it has a reserv tank equal to 2 pots which are hot all the time
the power switch is only for the warmer plate
you get out about what you pour in,

Nov 23, 2008 | Bunn NHB Coffee Maker

1 Answer

The water is not getting hot

You can check to see if the switch on the side of the tank is turned on and is working, but if the problem is with the tank heater itself, you can't get replacement parts for this model unless you can find a broken one at a garage sale or a Bunn service center. You can obtain a list of service centers in your area from

Oct 28, 2008 | Bunn Pour-Omatic Coffeemaker, 10 Cup White

1 Answer

Empty bunn coffeemaker

The easiest way to empty these brewers is to turn them upside down over the sink. Turn it on it's side, always keeping the fill hole down toward the sink, and keep on going until you have the unit completely upside down. If there is a push switch under the lid to stop water from going into the pot until the lid is closed, you will have to keep this pushed in until the unit is empty

May 30, 2008 | Bunn Cuisinart Coffeemaker: Pour-Omatic...

1 Answer

BUNN Pour-Omatic

Most likely it is your tank heater, but look on the top of the tank heater, because sometimes the wire will burn off the top of the element

May 20, 2008 | 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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