So, you have found a person who thinks being a coffee tech would be an excellent job! They have some mechanical skills as well as customer service sensibility, hopefully, perfect Coffee Tech Trainee! Now all you have is to teach them how to troubleshoot!
More than likely, the trainee will be unfamiliar with the specific industry equipment. Their initial troubleshooting technique may lead to every worst-case scenario, even in the most straightforward jobs. They will tend to make things more complicated in the beginning if allowed to try to troubleshoot on their own without some proper training and guidance.