Hubby found AC contractor on Angies List. Don't know if that is nation wide but local companies are reviewed and rated by customers on that site. The guy that came out lied through his teeth and said there were some parts that were bad. Wanted $1500 to repair. Hubby didn't buy it and are regular guy came out the following week. Just needed some freon. Hubby wrote his own review for the first guy.

I hate when repair people are dishonest. Be honest the first time and you will have a customer for life, plus referrals.
I unplug appliances when leaving on vacation. Definitely do not run washer, dryer or dishwasher while I am out of the house. AC and Heat are on a temp control. I do unplug my toaster when done using it.