When I was in high school, I took one class called Agricultural Mechanics.
In this class, you were taught how to do different things like welding, carpentry, plumbing, electrical, mechanics, and other helpful things.
I never planned to go into a trade school, but I figured the class would be helpful if I ever needed to fix something at my own house. One day, an HVAC technician came to our school to teach us how to fix something on our air conditioner. While the HVAC technician told us that there was no way that we could learn how to fix everything in an air conditioner in one day, he told us that he could show us how to change the capacitor on our air conditioner, which needed to be done fairly often. He told us that if we ever had troubles with our air conditioner, you can call an HVAC technician and ask them to inspect your air conditioner. If the problem was not the capacitor, you could have them fix your air conditioner. But if the problem was the capacitor, these would be the steps you could follow. You started by turning off the electricity to the air conditioner and then removing the safety panel off of the condenser. The capacitor looks like a giant battery, and once you remove the wires from them, you have to short out each prong with an insulated screwdriver. After replacing the capacitor, panel, and electric breaker, your air conditioner will run like new! Last week, I had to change the capacitor on my air conditioner, and I saved a lot of money doing it myself.