I turned on the ac unit of the house we bought in November just to test it so I knew it was working before the 100 degree days come in July.
The blower turned on but the air was not cold so I checked the compressor outside......nadda. I followed the steps provided here and checked the thermostat, tightened any loose connections and still the unit did not start. So, I removed the access panel on the compressor unit and saw that the contactor was in poor shape. I tested that there was power going to the unit with a pen style voltage detector. Then, I manually pushed the contactor and right away the system fired up.
I went online and 30 dollars and 2 days later my ac unit is pumping out that sweet cold recirculated air! Thank you guys so much for making this site and saving me at least 300 dollars.