Question about Bunn CWTF 15-APS Coffee Maker

2 Answers

Bunn CWTF15-APS Unable to hold 195 at the brew head

  1. Unit is in the pour over mode and the external water supply lines are not connected.
  2. The thermostat is set to the maximum.
  3. Water heats up to 205 degrees and the green ready light comes on
  4. I add 1 quart of water and brew head holds 195 degrees
  5. Wait for the water to heat up and green ready light comes on
  6. I add 2 quarts of water and the brew head drops from 195 to 180 degrees half way through the cycle.
  7. When the 2 quarts finish running through the machine it takes 7 minutes for the machine to go to a green ready light state.

a. I have an accurate gauge to measure temperature.
b.It seems to me that this 1300 watt element is never going to be able to hold 1/2 gallon of water at the brew head to 195. There is one gallon of hot water in the reservoir at the start of the cycle and adding one half gallon of cool water to the reservoir seems to be too large of a load for the 1300 watt element to keep the reservoir up to 200 degrees. It seems like I have to add hot water to this machine to produce 195 at the brew head.
c. Can I throttle the water going down into the reservoir from the pour in pan? Would this mess up the flow at the brew head and the coffee quality?
d. Would using the plumbed in water line help me hold the water temperature at the brew head. The thought that the plumbed in water line will throttle back the incoming water.
e.. I need to brew 2-3 gallons of good coffee on Sunday mornings. My motto is: We are having good coffee at church from now on. Well I will as soon as you guys fix my coffee machine.
f. Would a new heating element make a significant difference? Could I go to the next larger element the 20 amp one?

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  • Master
  • 1,618 Answers

Yes it is possible to go the the next larger element.
Yes if the machine was plumbed there would be a difference in the way it brewed the water temp. if you look at the end hose in the pan from the solenoid, it takes a while for it to pour out 3liters.
Try using a different sprayhead(if yo;u are using a 6 hole try getting a 5 hole. That will constrain the flow of water a little more allowing the element more time the heat the water.

Posted on May 16, 2009

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  • Bunn Master
  • 2,237 Answers

The tank on the inside holds 5 quarts of water that heats up to 205. when you pour water in the machine, it fills into the bottom of the tank pushing hot water out the top and through the sprayhead. the more water you put in, the colder the tank gets until it has time to heat up again. if you wand it to heat faster, get a cwtf35. it takes 220vac, but it has 2 elements

Posted on Sep 13, 2014


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Posted on Jan 02, 2017

  • 131 Answers

SOURCE: Bunn CWTF15 Airpot brewer

If the unit does this constantly, it's probably seeping past the solenoid valve. you can try taking it off and check for dirt or corrosion that is stopping it from closing properly, or replace it. the solenoid valve is located under the front panel, and is silver in colour with 2 wires & 2 copper tubes coming to it. as always, please be sure there is no power coming to the unit before servicing!!

Posted on Feb 12, 2009

  • 22 Answers

SOURCE: can you turn a CWTF15-APS Airpot Coffee Brewer to a pour thru

Yes, most Bunn CW models have the ablilty to be used as a pour over. There should be a lid on top.

Posted on Jul 21, 2009

  • 189 Answers

SOURCE: resevoir tank not filling

If you will get the model and date code located on the bottom of the unit and contact customer service, we will be able to help troubleshoot and resolve your issue.

Posted on May 19, 2010

  • 592 Answers

SOURCE: dry coffee is left in funnel after brewing.

After use many coffee makers and hot water drink machines will gather mineral deposits. This is very common and the typical maintenece is to run a few cups of white vinegar through the unit a couple of times. This will loose and clean the unit. After this you run water through it a few times to remove the vinegar left behind.

You can also buy professional cleaning/descaling solution like this

Posted on Jan 21, 2011

  • 1618 Answers

SOURCE: I have a used Bunn

I would remove the front panel and check the pressure stat to make sure it is set high, turn knob all the way to the right the back it up 1/4 of a turn. It that is done and after 7 minutes water is not hotter then the problem is on the top, the hi-limit needs to be replaced.

Posted on Aug 26, 2011

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