If there is anything I hate is someone charging me when they didn't do a damn thing. My heater part of my a/c went out 2 years ago when we got that freeze. So I called my warranty company and they recommended Wolff Mechanical, so they came out cause no one else was available. Just so happen when they came out, they determined nothing was wrong with the unit eventhough my girlfriend was sick and it was ice cold in my house. They still charged me for the service call, but told me to call them back when it happend again. So less than an hour later, I called them back and they came out and said that everything was fine and was about to leave and I demanded I get some answer. Unfortunately, of course everything was just fine, but I was freezing my ass off and will never call them again and will tell everyone I know never to call Wolff Mechanical.