Question about Bunn Coffee Makers & Espresso Machines

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I have a Bunn STF-35. After using the water faucet on the side the machine will automatically brew an equal amount of coffee in the pot. Anyone know where to start?

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  • Inky Fingers
    Inky Fingers Dec 30, 2018

    It sounds like an issue with the fill valve opening the brew valve. They may just be wired incorrectly if its a recently aquired seconhand machine. Otherwise it may be an issue with the control board

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This could be an issue with the wiring of the fill and brew valves or it could be an issue with the control board. When you draw water off, the machine should replace the same volume of water by opening the fill valve. If the brew valve is opening at the same time, tgen there is an issue. I recommend placing a service call.

Posted on Dec 30, 2018

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SOURCE:

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Posted on Jan 02, 2017

EsWorld
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SOURCE: I have a STF-35 , brews more then the pot , can

Yes, but you need the pre weighed grommets from bunn, if you remove the top panel on the machine you will see the brew tank, within that there will be brown plastic shaft with a yellowish cylinder on top of it. There might be 3 or 4 washers on top of that yellow piece, those are the weights, when the water fills the tank it pushes the float up and when it reaches the top it turns off the solenoid. You should be able to try it without the top on.

Posted on Jun 30, 2009

EsWorld
  • 1618 Answers

SOURCE: Set flow amount on Bunn STF 35

Remove the top panel and look for the yellow float, this controls the amount of water brewed, to adjust remove some of the washers on the float and test until you get the amount needed.

Posted on Jul 24, 2009

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1 Answer

Hello. Bunn coffeemaker VPR Series. When water is poured in coffee starts to make. Carafe gets about 1/3 full and then just drips through filter for about 5 minutes. Never makes full pot.


VPS/VPR are pour over brewers. Like the 12 cup brewers you find at home, they need to be filled with 12 cups of water (a full pot), heated and then peculated over the coffee grounds and collected in a decanter.
BUT there is one main difference! The VPR and similar COMMERCIAL coffee machines are quick brewers. They usually have a pre-heated pot of water stored inside the machine.
* VPR's and similar machines REQUIRE a pre-fill and heating period prior to brewing. This means it's sitting on a level table and filled with water until water sprays from the brew head. At this point the unit is plugged in and the heater is turned on (there may be some water discharge from brew head as the water expands). Ready light will come on in about 15 mins.
* To Brew; Place coffee grounds in filter, place in funnel and brew head, clean empty decanter under funnel, slowly pour one full decanter of water (cold or hot) into brew tray. Do not overflow tray. Allow water level to sink before adding more water. Only fill with one pot as an equal amount will come out the brew head and funnel.
* Make sure the decanters are all the same size. do not mix a 12 cup pot with a 10 cup pot. One will over fill and the other will under fill. Make sure they match (in cup volume) FYI; Thermo Air pump pots are usually bigger than one pot. Typical filling only to 3/4th of the container. (I think most are in 2.5 to 3 liter sizes)
* If your not getting a full pot then the brewer was partially empty. The second brew (if done within the next hour) should come out full.
* If your still not getting a full pot then the water is leaking or is boiling off. Does it always steam from the top? Thermostat is shorted. Unplug the brewer and call vendor for service.
* Final; If your unplugging when not in use. Then follow the Pre-heat instructions mentioned above prior to plugging the brewer back in. If the tank has been emptied at night or dried up after an idle week. Then there is a chance you may over heat and blow the thermal fuse. Or at best have a half pot short brew as the water dried up.
* Note leaving the brewer plugged in without brewing daily is not a good idea. The water evaporates and eventually drys out the pot. Takes about 1-2 weeks but it does blow the fuse(s) and the unit will need service.
* Final; Follow the Bunn set up and care instructions (manuals from Bunn.com for down loading. *FREE*)
Aloha, ukeboy57

Jul 20, 2017 | Bunn Coffee Makers & Espresso Machines

1 Answer

Have a bunn vps series pour over that won't brew


VPS are pour over brewers. Like the 12 cup brewers you find at home, they need to be filled with 12 cups of water (a full pot), heated and then peculated over the coffee grounds and collected in a decanter.
BUT there is one main difference! The VPR and similar COMMERCIAL coffee machines are quick brewers. They usually have a pre-heated pot of water stored inside the machine.
* VPR's and similar machines REQUIRE a pre-fill and heating period prior to brewing. This means it's sitting on a level table and filled with water until water sprays from the brew head. At this point the unit is plugged in and the heater is turned on. Brewer will pre-heat the water (there may be some water discharge from brew head as the water expands). Ready light will come on in about 15 mins.
* To Brew; Place coffee grounds in filter, place in funnel and brew head, clean empty decanter under funnel, slowly pour one full decanter of water (cold or hot) into brew tray. Do not overflow tray. Allow water level to sink before adding more water. Only fill with one pot as an equal amount will come out the brew head and funnel.
* You can test the VPR by following the Pre-fill instructions I've listed earlier. If the brewer heats up and does not continuously boil (shorted condition) then try a brew. If it works then your okay. Otherwise the unit will need service for a blown high limit or bad heater element.
* Call your coffee vendor anyway. Many coffee vendors will service your brewer of even replace it as long as you buy coffee from them. Ask around.

Aloha, ukeboy57

May 27, 2017 | Bunn Coffee Makers & Espresso Machines

1 Answer

I have a bunn coffee pot that i purchased at KOHLS The serving pot leaves a mess from dripping everytime i go to . please replace the serving pot. Kohls WILL NOT REPLACE TOLD ME TO CONTACT YOU.


* Most decanters are made of tempered glass and unless cracked it should not leak.
* Make sure the two pots you are using (one to pour one to brew) is the same size. Check by filling one then pour into the other. If they don't match then get a matching one.
* Most overflowing pots are caused by over filling brewing tank. This can be caused by re-pouring additional water into the brew tank. (automatic brewers may have a leaking water valve - call your vendor for service)
* Partial brewing (taking coffee from a brewing pot) and then putting in more water.
* Removing the pot BEFORE it stops dripping. It leaves a puddle of coffee on the warmer plate
*Over filling the water tank. Most times the extra water will spill out the back. But some may overflow into the basket area then the warmer plate.
* Follow the MFR brewing instructions for filling.
* All brewers should stop water drips after brewing. If you get a constant drip AFTER brewing then have the brewer checked or replaced. Call your vendor.
Aloha, ukeboy57

PS: I've noted that you don't mention the brand nor model of the server you got from Kohls so I'm guessing it might be a dispenser or even a bunn dispenser which is different from a decanter as it has a serving spout. You find these at banquet halls where it's dispensed from a small faucet. You can find similar faucets from bunn.com or most restaurant supply stores as it's a very common item. Amazon.com has them too. the part tat leaks is the rubber boot or worn spring. best to buy the whole faucet and keep the old one for parts as needed. amazon link:
https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=coffee+dispenser+parts+faucet&rh=i%3Aaps%2Ck%3Acoffee+dispenser+parts+faucet

Feb 14, 2017 | Bunn Coffee Makers & Espresso Machines

1 Answer

Cant start the coffee


VPS/VPR (VP17-3 are the same except it has 3 lower warmers) are pour over brewers. Like the 12 cup brewers you find at home, they need to be filled with 12 cups of water (a full pot), heated and then peculated over the coffee grounds and collected in a decanter.
BUT there is one main difference! The VPR and similar COMMERCIAL coffee machines are quick brewers. They usually have a pre-heated pot of water stored inside the machine.
* VPR's and similar machines REQUIRE a pre-fill and heating period prior to brewing. This means it's sitting on a level table and filled with water until water sprays from the brew head. At this point the unit is plugged in and the heater is turned on (there may be some water discharge from brew head as the water expands). Ready light will come on in about 15 mins.
* To Brew; Place coffee grounds in filter, place in funnel and brew head, clean empty decanter under funnel, slowly pour one full decanter of water (cold or hot) into brew tray. Do not overflow tray. Allow water level to sink before adding more water. Only fill with one pot as an equal amount will come out the brew head and funnel.
* Make sure the decanters are all the same size. do not mix a 12 cup pot with a 10 cup pot. One will over fill and the other will under fill. Make sure they match (in cup volume) FYI; Thermo Air pump pots are usually bigger than one pot. Typical filling only to 3/4th of the container. (I think most are in 2.5 to 3 liter sizes)
* If your not getting a full pot then the brewer was partially empty. The second brew (if done within the next hour) should come out full.
* If your still not getting a full pot then the water is leaking or is boiling off. Does it always steam from the top? Thermostat is shorted. Unplug the brewer and call vendor for service.
* Final; If your unplugging when not in use. Then follow the Pre-heat instructions mentioned above prior to plugging the brewer back in. If the tank has been emptied at night or dried up after an idle week. Then there is a chance you may over heat and blow the thermal fuse. Or at best have a half pot short brew as the water dried up.
* Note leaving the brewer plugged in without brewing daily is not a good idea. The water evaporates and eventually drys out the pot. Takes about 1-2 weeks but it does blow the fuse(s) and the unit will need service.
* Final; Follow the Bunn set up and care instructions (manuals from Bunn.com for down loading. *FREE*)
Aloha, ukeboy57

Mar 28, 2014 | Bunn VP17-3 Coffee Maker

2 Answers

Keeps spilling over during brewing


These tanks can't actually be overfilled since all water poured in displaces the exact same amount of water coming out the spout. So, whatever amount of water you pour in, will be the same amount of water that flows to your pot minus the amount absorbed by the coffee grounds and filter.

Your problems sounds like an undersized (Non Bunn) filter, or clogged brew basket. To verify this, try pouring in only half the water for your brew cycle and wait for it to finish dripping, then pour in the rest. If no overflow has occurred, you simply have the wrong type of filter. If overflow begins again, you have a clogged brew basket, since no Bunn can flow too fast for the brew basket to keep up with it.

This is because Bunn filters are manufactured differently than generic store bought paper filters. They will flow faster, brew cleaner and stand up better than normal generic filters.
Remember, Bunn makes their OWN filters for good reason.
They made the first, best paper filters for drip coffee pots, and all others are just generic dioxin gas producing paper.

Mar 05, 2010 | Bunn VPR Coffee Maker

1 Answer

Set flow amount on Bunn STF 35


Remove the top panel and look for the yellow float, this controls the amount of water brewed, to adjust remove some of the washers on the float and test until you get the amount needed.

Jul 24, 2009 | Coffee Makers & Espresso Machines

1 Answer

I have a STF-35 , brews more then the pot , can you adjust the amount of water per brew ?


Yes, but you need the pre weighed grommets from bunn, if you remove the top panel on the machine you will see the brew tank, within that there will be brown plastic shaft with a yellowish cylinder on top of it. There might be 3 or 4 washers on top of that yellow piece, those are the weights, when the water fills the tank it pushes the float up and when it reaches the top it turns off the solenoid. You should be able to try it without the top on.

Jun 24, 2009 | Coffee Makers & Espresso Machines

1 Answer

I HAVE A BUNN COFFEE MACHINE THAT IS SUPPOSED TO BREW 69 OZ OF COFFEE AUTOMATICALLY BUT IT IS BREWING MORE HOW DO I REDUCE THE AMOUNT OF WATER ITS BREWING. IT IS AN S SERIES


Inside of the front cover is a brew timer dial turn this counter-clockwise a little bit, then try brewing another pot. re-adjust as needed. Just watch where you put your hands in there.

Oct 24, 2008 | Bunn NHB Coffee Maker

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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