There is a lot of benefit that can be gained from being the sort of person that adopts a DIY mentality in terms of fixing things that might need fixing at any given point in time. A big part of the reason why that is the case has to do with the fact that you would be capable of saving some pretty vast quantities of money that would have otherwise gone to repair technicians, but the only problem here is that when it comes to relatively complex systems like HVACs the fact that something or the other might go wrong means that you need to get into the more technical aspects of these systems which you might not be immediately familiar with in some way, shape or form.
Hence, if you want to make it so that you can fix your HVAC all on your own, you must first learn more about the HVAC. The first thing that you need to realize is that there are a lot of different types of HVACs that are out there at present, and each and every one of them would need to be handled in such a way that they would have unique repair practices associated with them.
Being DIY about HVAC repair is about a lot more than just opening it up and cleaning it out. Rather, you must familiarize yourself with the different components of your HVAC and service it accordingly. Otherwise you run the risk of damaging it and this would necessitate you calling in a repair technician which would defeat the purpose of you trying to be DIY in the first place since you would end up spending even more money.