Behmor Coffee Roaster Hack - Override the Err7 Timeout
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- Опубликовано: 20 окт 2024
- Hack your Behmor 1600 to resume roasting after timing out (error 7) when the start button is not pressed in the last 30 seconds of a roast. We have all done it, spaced out and forgot to press the start button near the end of a roast, and the beans are basically ruined due to underroasting.
Please be aware that this will void your warranty, and I am not responsible for any harm or damage caused by a modified roaster. I recommend only roasting outside and always being present while roasting. I hope this modification will save everyone beans. #SaveTheBeans
After posting the video, I now realize that I should have used a momentary switch. This would ensure the thermocouple is always active when the switch is not being used. The switch would then simply need held in during resart, then released. Also, I mistakenly referred to the Exhast chamber as the cooling chamber. Happy roasting!
01/25/2020 - I have been informed in the comments by Bryan Jackson that this hack will not work on the new AB models. Please see Bryan's comments for options on an AB model hack.
If you found this video useful, please free to support the channel with a small donation to paypal.me/Doug...
Thanks!
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Thanks for the great vid. Finally took the time to do it, and it worked like a charm on my 1600+. It took a little hunting, but I found and installed a “normal on” momentary switch…no way to “accidentally” leave/have the switch in the wrong position for the original intended safety feature.
Dope!
Just a heads up on this hack. This only works on the 1600 and 1600+ models. The new AB system including the three part upgrade with the faster motor, new power board, and new panel has much different programming and is not watching this sensor to prevent roast restart. Haven’t tried it yet but it looks like on the new panels it will need to be fooled with a resistor.
Bryan, Thanks for the extra info on the newer model. And the latest version finally has an audible beep, so hopefully people wont need to hack their appliances for them to work without frustration. Hopefully this video and the others that have used the hack technique inspired Joe Behm to finally add the beeper on the new model.
@@DougCardo- So glad for the beep. Unfortunately for those that pre-heat it's now super sensitive to that preheat time or temperature. Preheating for just 3 minutes and chamber at 154 degrees creates a scenario where the roaster won't restart. (super frustrating) I just measured the Chamber sensor at rest (garage is at 63 degrees) and it's 144.8 KOhms. I'm going to experiment with that this weekend on the chamber sensor as that's what I think it's reading. Will see!
@@DougCardo- Also side note the AB systems seems to have toned down the heat in manual P5 100% power. Still testing, but my 14oz roasts used to take ~13 mins. The last roast with the AB upgrade took 19 mins and chamber temp never got over 260 degrees when it'd hover over 300 for most of the roast with the old panel/board. Weird -
@@bjackson1975 Bryan, this is great info. Thanks for the extra testing you've performed.
Doug Cardo confirmed the new programming in the AB upgrade ignores The exhaust sensor and it’s only looking at the wall/chamber sensor. I put a 140 KOhm resistor on the wall sensor when the roaster heated to the point when it would not restart. That defeated the overheat signal and allowed it to restart. Next hack would be to introduce an A B type switch with resistor instead of the simple on and off switch. Hope this helps
Hey Doug Cardo, this video is super information and helpful. I modified an air popper last year to add a switch (relay) and thermocouple so I could hold roast profiles, and I just picked up the Behmore 2000 as well. I'm wondering if I could pull the thermocouple readings from the Behmore itself and read in the Arduino. Do you think this would be possible? I think you'd need to know the exactly thermocouple make and model to turn the signal into an accurate temp. Then I'd also need to use the Arduino to be able to interact with the button pushes. Just a thought, but you seem like the internet's foremost behmore hacker. I'd appreciate your thoughts!
Thanks Ben. That can definitely be done, and some people have done just that. Search for "franken behmor"
you have any idea how many time I've thought about throwing my Behmor across the room because I missed the Err 7 by a few seconds? This will save many future roasts (and the roaster from the landfill)...
NICE!
Like another user mentioned, upon unplugging the white thermocoupler while machine off as shown in this video results in error-1 within 2 seconds of starting the machine. I was extremely excited after watching this video, but this will not work on original 1600, maybe the gentleman creating the video has the plus version…
Any further advise to give me additional few minutes of roasting time will be much appreciated!
The original 1600 you don't have to hit the start button when the roast reaches 75% it just keeps on roasting from start to end. Don't need the button. Preheat the roaster before adding beans. You can also order a upgrade kit to make it like the 1600 plus.
Somehow I can't start while that white probe is disconnected, it shows error. Does it work on new Plus only? as I have original Behmor 1600. No, I didn't inserted the switch, just disconnected white probe from PCB to test. I can only start when reconnected the probe to PCB, but the probe provides high temp readings that prevents to start. What I'm missing? yes, I'd like to have ability to add more time when it's needed. I got many under roasted wasted beans as result of forced cool-down. My PCB of original Behmor doesn't treat treat disconnect white probe as normal temp readings. thanks
#SaveTheBeans
Thanks mate, just what I was looking for. Fitted switch, tested & working on Australian metric 1600 plus panel fitted to original 1600 roaster.
Thats great to hear! I'm happy it helped you out. My override has saved me many roasts.
I'm tied of the err2. I'm about to move my temp probe outside the machine and put a manual one in
How?
Just wanted to say thank you for the video! Saved me a lot of poking and prodding and head scratching. Next I’m looking to figure out how to bypass the 330° shut down (Err2). May have to do external chamber thermal monitoring but this unit doesn’t get hot enough, it seems like it more bakes beans than roasts them.
To avoid the Err2, just put a bigger side panel fan. I have a 1600 plus, and my fan broke so I had to change it out. I put in a bigger fan (Magic MGT7012ZR-O15 70mm 12v 0.41A) as I had it laying around, and I think it cools the sensor enough to never reach 330. I am able to do Dark+ roasts quicker than before on straight P5 manual, so it doesn't seem to cool the chamber, just the sensor. I have never had a Err2 shut-off since.
Hope that helps!
@@TimmyChisholm I completely respect what is being accomplished by adding more cooling to fool the sensor. It's a fairly blunt instrument though as sensor resistance changes (along with fan speeds) over time. Updated info on how the sensors work in the AB / 2000 boards a couple of posts below if interested. Thanks for taking the time to share!
The most annoying feature of the year on any product. The owner has deemed it "necessary " in order to keep idots safe from their own ignorance at your expense. After communicating with the company, and suggesting the option of a switch (he) they responded with the world class answer that this "switch" would drive up costs and force customers to another machine! WOW save the world buddy. Take the overide out and sell the product both ways. While it would be burdonsome knowing that boneheads who use your product burn down their homes out of ignorance, it is often just as comforting that you have triggered within them the more important lesson after they do so...that they are idiots and must act responsibly at all times! And will be so in the future because of the lesson learned! Short term thinking! Thanks for your Vid! That switch looks expensive!