Doing HVAV repair yourself, or DIY (Do it yourself) is not as hard as many think. There are many things that simple fixes can be done that could otherwise cost money to have a HVAC technician come out and fix the problem. Some things will require a technician mainly if there is any problem with the Freon in the system since this requires a EPA 608 certification but many others simple fixes can be done and are done every day. Condensing fan motor, contacts, start run capacitors, duct work, thermostats the list is endless when it comes to the DIY person the amount of money you could save.