When should you have your Heating and A/C units checked?

When should you have your Heating and A/C units checked? I have been heavily considering starting to get our Heating and A/C units checked right now.

I am just tired of having so many problems with our Heating and A/C units.

I don’t understand why our Heating and A/C units are consistently having trouble. I guess that our gas furnace and our central cooling system are old, but I don’t guess that they should be having this much trouble. Honestly, I do not want to complain about our Heating and A/C units. I understand that Heating and A/C units aren’t’ made to last forever, and I don’t mind spending money on our Heating and A/C units. My Heating and A/C units are unquestionably important, and I wouldn’t be able to survive without them. Since our Heating and A/C units are so important, and I am not exasperated about investing in our Heating and A/C units. However, our Heating and A/C units consistently seem to chop down at the worst time, but during the hottest afternoon of the summer, our central cooling system will swiftly stop working. During the coldest tonight of winter, our gas furnace will swiftly stop working. I have no idea what is wrong with our Heating and A/C units, however they chop all of the time. However, if I could have an Heating and A/C professional look over our Heating and A/C units and have them service the problems before I need the Heating and A/C units, it would be so much better. I heard that you can pay an Heating and A/C professional to perform these Heating and A/C inspections, and I plan to call them. However, I want to guess how often you need these Heating and A/C inspections. I am assuming that you would do them once in the fall and once in the Spring. That would make the most sense with the Heating and A/C units. What do you think?

Dual fuel system