Question about Bunn CWTF 42 12-Cup Coffee Maker

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Hi. Just installed a bunn cwtf 42 brewer. How to control amount of water when coffee is brewing

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  • Bunn Master
  • 2,236 Answers

See tip for callibrating a bunn cwtf

Posted on Jan 28, 2015

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6ya6ya
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Posted on Jan 02, 2017

SOURCE: my bunn is too slow

Use the de-liming spring to clean the copper tube behind the spray head. Pour several pots of clear white vinegar through the unit to further remove lime and scale from the interior of your coffee maker. My Bunn is 24 years old, and the only replacement parts I've ever required are new carafes and the 4041 silicone washer repair kit.

Posted on Sep 19, 2007

Buffalo12980
  • 625 Answers

SOURCE: Coffee Brewer comes out warm not hot

look at the top of the coffee maker you'll see two screws and the warmer tray and the cover for adding water. remove the two screws and lift the top off. the warmer has two push on spade terminals. pull the wires off them. below is a tray where the water goes and you'll see a brass bushing. this is screwed into a fitting on the water tank. use a piece of steel as a spanner and unscrew this fitting. don't lose the gasket that's under it. the main wires for the burner element and thermostat are also under this tray. look at the top. there's nine screws that hold the top on the water tank. two white wires go to the tank warmer and two wires go to the tank heater inside. you can try turning up the thermostat setting to a higher range and see what happens. there's a copper pipe that comes from the tank to the sprayhead the tank holds approx three urn fulls of water. if you have an analog meter you can check the element for continuity on the RX1 range. Do the same with the tank warmer element. Bunn-o-matic has a web site you can buy replacement parts or nelson appliance can get you parts too.

Posted on Nov 19, 2007

  • 2 Answers

SOURCE: Bunn VPR Coffee Maker

I own a bunn and my brother's business owns 2 of these. The rule of thumb as he was told by the salesman is 2 oz of coffee grinds per 48 oz of water.

Posted on Jan 24, 2008

  • 2 Answers

SOURCE: 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.

Posted on Mar 08, 2009

  • 454 Answers

SOURCE: coffee maker overflows

contact Bunn directly for help.

http://www.bunnomatic.com/retail/service/contact.html

Posted on Jan 20, 2010

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Bunn CW Coffee Brewer not brewing enough coffee - amount is half


Have you cleaned lately, put in an empty filter and fill with cold water with a tablespoon of white/clear vinegar. Run the brew cycle, empty pot and while still worm fill with cold water again with out vinegar. Than check filter to see how much hard water chunks are in the filter. Repeat with and without vinegar tell filter is clean. One question though is there a lot of steam coming out of the top during the brewing cycle if so inside there is a tube that may be cracked, broken or came loose, have to look inside. requires opening or disassembling unit to check. REMEMBER when taking apart UNPLUG unit first.

Nov 17, 2015 | Bunn CW Aps Single Airpot Coffee Brewer,...

Tip

How to calibrate a Bunn CWTF commercial coffee brewer


1. you need a 64 ounce graduated measuring cup or bucket
2. make sure the brewer is heated up to temp and the green light on the front is lit
3. open the front panel of the brewer
4. put the microswitch on the circuit board to "unlock" position
5. make sure the sprayhead is cleaned and open, the brew basket is on, and the measuring cup is in place to catch the water
6. press and hold the brew switch until the inlet solenoid clicks 3 times, then release
7. once the water level is at about 40 ounces, turn the main red switch off and let the rest of the water come out
8. if it brews short, press and hold the brew switch again until the 3 clicks, then press and release the brew switch for 2 more second of brew time (up to 5 times per brew)
9. if it brews too much, press and release the brew switch for two less seconds of brew time (up to 5 times), then press and hold the brew switch until the 3 clicks then release
10. once you get to 64 ounces, put the switch on the circuit board to lock and replace the panel
11. enjoy!

on Jan 15, 2015 | Bunn CWTF 15-APS Coffee Maker

1 Answer

!0 Cup home Bunn. Does not brew the number of cups of water coffee (water) in craft. 8 cups of water 6cups of coffee.


If you don't brew often enough you will loose a small amount of water in the tank due to evaporation while the tank heater comes on and goes off to maintain the proper brewing temperature, so if it has been a while since you last brewed, without coffee in brew basket put a carafe of water thru the brewer, you will get less than a full carafe out because it fills the evaporated space in the tank first then uses the rest to brew. Once your tank heater shuts off usually 5 minutes on less you will get out all the volume you put in.

Oct 11, 2014 | Bunn 10 Cup Home Coffee Brewer

1 Answer

Model cwtf-mv water does not turn off , press start to make coffee and water goes in but does not stop


First remove the front panel and there will be instructions fro reprogramming the brewer. If you have done this and it still does not work, then there is a problem with the control board.

Mar 01, 2011 | Bunn CWTF-MV Coffee Maker

1 Answer

Brew water does not get hot


Check heater switch is on in rear of unit.Could also be a the thermal fuse is bad.You can locate fuse by taking top of brewer off.Fuse is in-line going to one side of element and resembles a resistor.Can use a volt meter to ohm for resistance.

Dec 24, 2010 | Bunn CWTF 15-2 (1 Top Warmer) Coffee Maker

1 Answer

I have a bunn auto brew w/2 warmers.flow control/filter is installed and the basket overflows...


Either the coffee grind is too fine, too much coffee or incorrect sprayhead. Count the amount of holes on the sprayhead.

Aug 29, 2010 | Bunn -O-Matic Corp. 2 Warmer Auto Brewer...

1 Answer

When I put in, 6 cups of water, if the 10 cup Bunn coffee maker after it has sat overnight, it only expels about 4 - 4.5 cups. I don't think it can all be evaporating or being absorbed in the grounds can...


look for water leaks around pot. Otherwise do a daytime brew to compare your difference between the amount poured in and what comes out. Please note that less water should mean using less ground coffee. Suggest 1 heaping table spoon per brewed cup.

Feb 10, 2010 | Bunn 10 Cup Home Coffee Brewer

1 Answer

BUNN CWTF-15 Not brewing full pot, only 1/2 pot..?


If this problem started after moving the machine, pull the machine out a little & look behind it for a kink in the tubing coming to the brewer. These brewers time the water coming through them, so if a kink is restricting the water flow, running the same amount of time equals much less coffee in the airpot.

Oct 03, 2008 | Bunn CWTF 15-TS Coffee Maker

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