Question about Bunn Coffee Makers & Espresso Machines

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Bunn not used in a year. Now the water heats to only lukewarm after two hours. Is this situation hopeless?

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The heating coils may be calcified. With the machine off- pour some vinegar into the water tank. Let it sit over night. then pour clean water in and run it at least 3 times to flush out the vinegar.

Posted on May 06, 2017

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Posted on Jan 02, 2017

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SOURCE: Our Bunn VPR coffeemaker takes a LONG time to heat

We left vinegar in the coffeemaker overnight. Seems to have done the trick - water is heating up now after 20 or so minutes instead of several hours.

Posted on Jan 06, 2010

  • 349 Answers

SOURCE: water is lukewarm.

Make sure you have power going to elements from thermostats. check lines going to elements.

Luke warm water is the result of an element gone bad most of the time. One at th etop gone will cause you to get just luke warm water and one at the bottom gone will give you real hot and then cold.


The elements are not to exspensive so if it has two you might as well replace both of them. If you just put 1 new one in it will work the old one till it goes.

Cut power off and cut water off to water heater and drain heater, open hot side on any faucet to help it drain. once drained remove element they have a tube type socket at hardware stores for the removal of it.

Put elements in and fill water heater till all air is out of lines before turning power back on. make sure water is flowing out of all faucets before turning power onto water heater.

The reason being is the elements has to be in water not open air in tank or it will blow new ones.

Posted on May 16, 2010

  • 115 Answers

SOURCE: bunn-o-matio model btx-b does not heat water

Hi, Sounds like a boiler therostat or faulty boiler. Dazza REPAIRER

Posted on Sep 24, 2011

  • 5089 Answers

SOURCE: Newly installed Hott Rod in 6 gal RV water heater only heats to lukewarm. Has been on for 12 hours. Outside temperature is 60 degrees

Hott rod is 120Volt AC.
Check voltage supply for undervoltage, or reversed polarity, or tripped breaker.
Check that electric thermostat is set to 120 degrees.
Rotate thermostat temperature adjustment back and forth and see if you can hear water heater working.
Thermostats can be bad, or stick.
Check the ECO red reset button is not tripped out.
If tank was not full of water before power was applied, the element will instantly burn out.
Use continuity tester across bare element screws to see if element is good. Or use multimeter and test across bare element screws shows 29 ohm for 6 gallon, 18 ohms for 10 gallon.
More resources at Hott Rod, for troubleshoot and contact.
http://www.hottrod.net/hott_rod_troubleshooting.asp

Posted on Nov 01, 2012

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My Bunn Coffee maker is leaking water from the bottom.


I had the same problem. On mine (and probably yours) the problem was the seal between the (upper) plastic water reservoir and the lower (metal) heating reservoir. No replacement seal is available.

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It looks like this brewer has a fill lid on top. If you remove the screw on the lid you can remove it and pour cold water through (1/2 gallon per pot). If the brewer was energized and NOT filled with water before hand there is a good chance that the heating element burned up. The reason you would still get "lukewarm" water is due to the keep warm heater around the tank. It is a low voltage warmer that keeps the reservoir warm without the main heating element kicking in.

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I work for BUNN. Yes, you can empty it - here's a link to instructions http://www.bunn.com/retail/service/faq.html#faq6

Also, it's absolutely a perfect time to do the Periodic Cleaning of your brewer - here's a link to instructions for using vinegar to thoroughly clean your brewer. http://www.bunn.com/retail/service/cleaning.html

If you want to move the brewer without draining, please be sure to unplug it and let the water cool for about 6 hours before moving it (the water inside is 200 degrees). Then, when you get to the new location you can just plug it in and let it heat up.

Any other questions, please let me know. lisa.mccloud@bunn.com

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We left vinegar in the coffeemaker overnight. Seems to have done the trick - water is heating up now after 20 or so minutes instead of several hours.

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