Are a/c "tune-ups" a good means of preventative maintenance or are they a way for repair companies to find problems that aren't really there?

CPT (Join to see) HVAC units are mechanical, so periodic maintenance is necessary. Check with friends and neighbors for a reputable service company, and then get references from the company - and check at least a few of the references. May also be useful to check BBB and Yelp for reviews of the company you choose. So, yes, have the unit checked, but don't sign up for "annual service" - that can run up the tab beyond a reasonable sum. Good luck.

Standard procedure is to install a new unit anytime you build a new home. If the home is recently built then you should be free and clear this year. If not, as the others have said, it can be a bit difficult finding reputable service. I worked with a HVAC service prior to enlisting and nearly all techs leave some type of indicator when the last service date on a unit was. If it isn't located on your AC then it may be with the paperwork on the furnace.

If it isn't new pull your model name and you tube how to check the filter. Give all the fittings/connections a look over for corrosion as well as the wiring, also take a glance at the lower corners of the unit. If there is an internal leak you will find evidence on one of the corners.

If you are still skeptical chances are someone in your unit has experience with HVAC systems or can point you in the right direction. Ask around, and when you do find someone, pick their brain. Doesn't matter if you're a Private, a CSM, a 2LT, or a General ... we never stop learning from our peers.

Enjoy your new home!!

I know how you feel. The first time I bought a house (and the last time) I was overwhelmed. As for your AC it really depends on if you'll have any additional income to fix any problems. I bought my house 17 years ago and I had my AC unit go bad once. I called out the technician and he wanted to charge me over $500 to fix the broken motor fan. While talking to him my son (15 at the time) and I looked up the issue on youtube and it was indeed the motor. I thanked him for coming out and sent him on his way. I drove down to my local Granger store and purchased a motor for $120 and installed it myself.

Your decision should be based on brand, age, previous problems. It can't hurt but it's probably not necessary. Like Capt Porter said, it sucks when it's 100 degrees and you're waiting over the weekend for a person to fix it. It's not the end of the world but it sucks.

A good rule of thumb would be if you think you want it, do some research on a few different companies. Don't just take the first one who drops a card or flyer off at your house. Also, get to know your neighbors. You can gauge alot of the stuff you'll need by what they do. It will run the spectrum but at least you'll have a good idea of what YOU think you'll need. Also, they may have a good contact for you to call with a discount.

Also, your AC is not the only thing. Just wait, it gets better ;) Heating, water systems, plumbing, septic (if applicable), gas, electric. The good news is after a while it becomes normal for stuff to break down and you start learning how to fix it yourself.

That was a long way to say, it's up to you. Good luck and it will stop feeling overwhelming soon. Congrats on your house.