Bunn BT10B Coffee Maker Logo
Billy Dunshie Posted on Feb 28, 2008
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Schematic I need a wiring schematic for the Bunn Thermofresh (BT series ?). I took it apart and marked the wires, but a couple of pieces of the tape I used slid off, and I'm fairly sure how to rewire it, but I'd like to be totally sure ! Thanks.

  • 12 more comments 
  • Billy Dunshie Feb 28, 2008

    I have photos of the unit wiring and can answer any further questions; please note, this unit has no heading pad for the pot.
    There is a white wire (small round plastic insulators used) coming from one of the elements of the water heating unit, a black wire coming from the other along with a brown stripped wire coming from a slightly larger diameter plastic insulator that surrounds the one that the black wire comes from. There's a black wire coming from the thermostat (I assume it's the thermostat) and a blue wire that's grounded. There are 2 white wires that come up from the water heating cylinder (I assume to keep the water hot [rated 34W,120V]). The wires coming up from the switch are 1 white wire, 1 brown stripped wire, and a green ground wire.
    Any further details needed, please let me know. Surely there's a diagram for this unit somewhere !! I can almost work out the way it needs to be connected, but I'd rather be 100% sure than throw a breaker and ruin a good coffee maker.
    Thanks.

  • Billy Dunshie Feb 28, 2008

    No, that's not the service manual, that's for a VP series unit which has a warming pad for the pot and isn't like the BT series. I already have this digram, that's why I said I can almost figure out how the unit should be wired, but I'm not 100% certain.

  • Billy Dunshie Feb 28, 2008

    No, right on the bottom of the unit it says BT10-B; I downloaded the user manual for the coffee maker, which was:
    38864.0000_BTX_U_C_English.pdf .
    The diagrams listed are close, but that's not it.

  • Billy Dunshie Feb 28, 2008

    No webcam but photos. The unit also says Thermofresh on the front.

  • Billy Dunshie Feb 28, 2008

    The diagrams are close but not getting it.
    I searched on the Bunn site listed given in the link, but can only find the user manual, not schematics.
    And the model is BT10-B.

  • Billy Dunshie Feb 28, 2008

    Thanks guys, I really appreciate it.
    I'd almost have to call Bunn or find someone with the same unit that would be willing to pull the top.
    I'll post a follow-up when the unit's working and back together.

  • Billy Dunshie Feb 28, 2008

    No offense intended. Extremely helpful, but I've pulled up all this info already. I'm ready to just draw the diagram myself and get the thing back together. 'Had to make coffee in a pot this am :)!!
    Thanks again, you all have been very, very helpful !!! All of you !

  • Billy Dunshie Feb 28, 2008


    There is the white wire that goes to the element, black and brown come out from a thermistor(?) on top, and a black comes from the level indicator(?) with a blue grounded. 2 whites come from the side of the water tank that normally keep the water hot.
    Thanks.

  • Billy Dunshie Feb 28, 2008

    There appears to be no connection that goes to the other terminal, and it looks as though there never was a connection here; I thought possibly one end of the element was grounded, but my meter doesn't indicate this.
    Many of the schematics are coming very close, but not quite.
    I'm working right now trying to diagram this thing out, 'just haven't quite got it, because I'm not sure what I call a water level indicator really is, but what else would it be ? The thermistor controls the temp, so I'm not sure about it.

  • Billy Dunshie Feb 29, 2008

    I think that the round unit that protrudes into the tank is the limit switch; why would you need anything to indicate water level (well, to indicate a dry tank, but I don't think that's it) on a coffee maker such as this one ?
    So, it looks as though a hot wire from the switch would hit the brown wire to the thermistor and also on of the whites to the lower heater, the white to the element would tie into the black from the thermistor, and now I'm stumped. The other end of the element doesn't indicate that there was ever anything there; if I take the white plastic from the element post that the white wire's on, there's a clear plastic covering over that, so it looks like the element is tied in some other way or I really pulled a silly stunt ! It seems it would work fine if the black from the limit switch went to the terminal that looks as though nothing was ever there, because then, with the blue from the switch grounded, we'd have a complete circuit that looks half-way right.
    Thanks for all the help. I really hope you all don't give up on me !!!

  • Billy Dunshie Feb 29, 2008

    BTW, this is a 120V unit.

  • Billy Dunshie Feb 29, 2008


    What is this ? Not sure if it's a limit switch or what. I can't get any kind of reaction from
    it; it's in a closed state right now. I'm not sure if it's an overlimit switch, but I didn't want to get it too hot in case it's not; water seems to have no effect on it either.
    Thanks for the time and effort. I have all of the manuals that have been listed, but really appreciate the help. If I knew what this was, it would help a great deal; the end with the
    connector goes to ground, the black wire went ??

  • Billy Dunshie Feb 29, 2008

    I think you all think I'm a freeloader just trying to get free help.
    I'm not, but who do I pay ? And I wouldn't mind paying more than one person, but whoever it was that posted the link to the
    VPR models definitely came very close.
    If you can decide among yourselves, or if the mod needs to do it, I'll be glad to deposit more money in PayPal and pay you all. You've been extremely helpful, and I realize I haven't been that clear and concise.
    Thank guys and girls :)!!!

  • Billy Dunshie Feb 29, 2008

    That's not really the correct circuit, there's no varistor in it, and I still don't know what the little unit I posted the last picture of is, if it's a limit switch or has something to do with water level?. I'll keep working on it, thanks to all of you who posted and helped, it's really appreciated, and I'd have paid you all if I had that kind of money; I just paid the last person who posted, because they seemed to persist and really tried to help.
    Thanks !!

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Hate to ****** a post but i can't find anything close to what i am looking for i have the same exact machine but i did the white vinegar thing worked like a charm but i noticed that the heating element on the bottom will not heat at all is there a solution for this problem that i can do locally if not i will have no choice but to scrap it and i really like this coffee maker

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Hello,

Have you try this link? http://www.bunnomatic.com/pdfs/commercial/manuals/39338.0000.pdf


Hope this will help you

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  • Posted on Feb 28, 2008
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  • Anonymous Feb 28, 2008

    ei Falcon you said "you really appreciate the help of the guyz here"



    If you don't mind change the rating into helpful.



    Cheers!

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Hiya falcon18!

Unfortunately, the service manual or schematic you seek does not appear to be available online - a common occurance for small appliances. In my opinion, your best bet would be to give Bunn a call at 800-352-2866 (Business Hours apply) and see if they can take care of ya.

Good luck!

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  • Posted on Feb 28, 2008
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  • Posted on Feb 28, 2008
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Hi,

Click HERE for the service manual.

Goodluck..

  • 1 more comment 
  • Anonymous Feb 28, 2008

    There is no service manual available for your manual.The only solution is to contact them or send them an email and get one.


    Main support number: 1-800-352-2866
    Email: support[email protected]

    Goodluck..

  • Anonymous Feb 28, 2008

    The email id is
    home@bunnomatic.com

  • Anonymous Feb 28, 2008

    There is no service manual available for your manual.The only solution is to contact them or send them an email and get one.


    Main support number: 1-800-352-2866
    Email: [email protected]

    Goodluck..

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  • Posted on Feb 28, 2008
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Wow...that's an interesting situation. Let's see what we can find in the world of wiring diagrams. Bunn makes a good machine, no doubts about it..

  • 1 more comment 
  • Anonymous Feb 28, 2008

    here's a link for manuals

    that series does not appear on here, so there must be another model number somewhere..

  • Anonymous Feb 28, 2008

    falcon..you got a webcam? maybe an over the shoulder will help you out?

  • Anonymous Feb 28, 2008

    here's a neat video that this session reminds me of..


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  • Posted on Feb 28, 2008
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Please say the model number

  • Anonymous Feb 28, 2008

    here you go for manual


    click here

    thank you sir

    good luck

    dont forget to rate the solutions

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