Even though we can’t recommend it, it is possible to adjust the Popper’s thermal switch position and reach higher roasting temperatures.
The Popper roaster has a thermal cutoff switch to prevent the machine from hitting high temperatures too fast. This is an important safety feature (required for UL).
It also might tell you that your heat ramp is too fast, and you should slow down your initial roast temperatures, and turn down the heat a bit when the coffee is in First crack in one of two distinct heat-induced pyrolytic reactions in coffee. It is distinguished by a cracking or popping sound in the coffee, and occurs between 390 and 410 degrees Fahrenheit in most coffee More. That’s generally best for the roast quality! We have a video about this: https://library.sweetmarias.com/roast-development-to-second-crack-in-popper-coffee-roaster/
But if you find the thermal cutoff switch is getting in the way of the Roast Profile refers to the relationship between time and temperature in coffee roasting, with the endpoint being the "degree of roast". Roast profiling is the active manipulation of the "roast curve" or graphed plot of More you want, don’t disable it. It is possible to get to higher roast temperatures with a simple adjustment: Loosen one screw and slide it up the roast chamber a bit! Easy peasy. But a warning, opening up the popper and messing with things means no warranty, so proceed with care if this is something you choose to pursue.