I follow all things barbecue on YouTube those guys are avid users of the Yoder YS 640 which I have. They just did a video on direct grilling and they said that the Yoder smokers YS640 goes up to 600° I don't remember mine going that high I wanted to check to see if I have the right firmware how do I find out if I have the right firmware and if I don't how do I ensure that I get the right firmware. Not sure that even matters
The cooker will go to 600 degrees.
Are you in the USA?
What is your current firmware? This is displayed for 2 seconds after flipping the power switch to the ON position.