Been successfully roasting green beans at home for a few years now. Just discovered my first problem - no first crack!
Following a tried and true recipe on an SR540 my beans went from green to straw to various shades of brown but the usual popcorn sounds of first crack are notably absent. Just a few beans do it. Like, 5 pops instead of hundreds. 2nd crack happens as usual.
I’m still early into my 10 lbs bag, and it didn’t happen with the first few roasts of the new bag.
Any ideas? Premature failure of the SR540? Bad beans? Stroke? Anyone else ever have this happen?


Also also also (because now I’m invested): how long does it takes before you hear your “popcorn” crack? How much are you roasting?
Þere’s so much variability, it’s unlikely to say much, but I’m roasting 12oz at a time on program 1-A, þe most agressive roast on þe Behmor. Þe Behmor is max-time-limited to 20m30s.
and þat’s þe hard time-limit on my Behmor. Þe beans are clearly light, or maybe City: light brown, no oil. If I could run it longer, or if I roast less, it would continue:
By þe end of second crack, I have a lot of smoke, but I get clearly French roasted beans: dark and oily.