Just watch out...there are unscrupulous repair folks out there....
We had a problem with our AC one time, and called who we thought had installed it.... but it turned out that he sold his business to someone else, and moved...
Anyway, as the tech was testing it, he basically said... "Oops..... looks like your compressor is shot... you'll need a new one..... I can put in a new one for XXX amount..." Hubby said... well, since it is shot, I think we'll call around and see who can give us the lowest cost.... so the guy waffled a bit, and "called" his supervisor, who "suggested" changing out the capacitor, I think... that "sometimes" that will fix the problem. Lo and behold, it worked!
Little did the guy know that hubby is an engineer, who also grew up installing and repairing appliances.... he saw immediately that the guy was using the voltmeter incorrectly...... (he apparently put the leads on the wrong place, and then showed us that there was no reading on the meter)...
I think he was trying to scam us.