I have even done some minor maintenance and repairs on my own HVAC and that’s because I learned that from my old woodshop teacher
Back in high school, I had a woodshop teacher who went above and beyond. He helped everybody with all their projects and there were a lot of cool things we made. We made bubble gum machines, nightstands, tables, and other neat stuff. There was one time when the cooling system in the shop broke down. I asked the teacher if he was going to have an HVAC professional come out, but he said he wanted to teach everybody how to fix the cooling system. When somebody asked if he was HVAC certified, he said he was indeed. He evidently had gone to a trade school and become HVAC certified, but he decided to get into teaching woodshop instead of working on HVAC systems for a living. He actually was extremely knowledgeable and made the work look easy fixing the cooling unit. I remember the first and most important thing was making sure the power was shut off the cooling unit. He said if that electricity was hot, that could be the end of your life. That was something that I could never forget. I also could never forget how amazing it was to see the inside of the cooling machine and learning about the different components. I have even done some minor maintenance and repairs on my own HVAC and that’s because I learned that from my old woodshop teacher. It’s crazy how things can stay with you over the years like that. I think I would have been happy going for my HVAC certification too, but I ended up getting into another career path.