20 Most Recent Bunn -O-Matic Corp. 2 Warmer Auto Brewer Black Questions & Answers

You will need to check the heating element wiring to see that isn't a short on the neutral side. This could cause them to continue to heat even if the thermostat is working. If all wiring is ok check the function and resistance given by the thermostat.

Bunn -O-Matic... | Answered on May 07, 2014

Generally it is due to a bad or heavily calcified thermostat.

Bunn -O-Matic... | Answered on Mar 24, 2014

I have a complete inventory of bunn parts
Not trying to make a quick buck just trying to help
call 715 832 3045


Bunn -O-Matic... | Answered on Aug 21, 2012

If by meaning the coffee pot, the bottom warmer maybe loose and dropped inside the machine.Normal brew temp is 195 degrees out of tank.There also may be problem with the hi-limit ,t-stat or element.

Bunn -O-Matic... | Answered on Feb 06, 2011

Check out:


This is the free full service manual F15, F20 & F35 complete with troubleshooting section at the rear. This section has easy, plain english steps to follow to solve this very problem (others, too).

Good luck!

Bunn -O-Matic... | Answered on Jan 16, 2011

If the solenoid is working properly then the float switch for the brew volume needs to be cleaned because it might have some build that weighing it down.

Bunn -O-Matic... | Answered on Nov 26, 2010

THe most likely answer is that the tube that leads to the sprayhead is clogged with lime. You will need to remove the spray head wich is located above the brew basket and make sure the holes are not clogged with lime. Use a wire brush to clear them. In the field I would use a deliming spring but you may need to go to a lowes or home depot to find a tool you can use to clear the tube wich is what the spray head screws onto or just goole deliming spring and try to order one off line. It is a long flecible very tightly wound dpring about 14 inches in length or so. www.midstaebeverage.com

Bunn -O-Matic... | Answered on Nov 16, 2010

Is it still under warranty? Bunn should take care of it for you if it is. Usually if the coffee is only warm it may mean that a thermal limit has tripped. The water stays warm because the tank has a heater blanket that is wrapped around it but you aren't getting any power to the heater that is in the tank.
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Bunn -O-Matic... | Answered on Nov 02, 2010

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

Bunn -O-Matic... | Answered on Sep 01, 2010

Sounds like the fill solenoid is damaged and needs to be replaced.

Bunn -O-Matic... | Answered on May 31, 2010

Descale machine or run deliming spring through the brew tube after removing the sprayhead.

Bunn -O-Matic... | Answered on Mar 13, 2010

Sounds like you need a new grommet for the machine.

Bunn -O-Matic... | Answered on Feb 03, 2010

You may have a thermostat problem.

Contact a Bunn service center and have the unit checked.

Bunn -O-Matic... | Answered on Jan 03, 2010


The unit has a tank used to heat the water for brewing.
When you add more water, the unit starts the brew cycle.

Bunn -O-Matic... | Answered on Dec 31, 2009

Either the start switch or the solenoid is not working, use an ohmsmeter to check resistance.

Bunn -O-Matic... | Answered on Dec 14, 2009

The pressure stat is defective and needs to be replaced.

Bunn -O-Matic... | Answered on Oct 29, 2009

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