Capacitor.

I made the mistake of calling SunKool

We had the same problem last week. All we had to do is go to the unit in the garage and you will see the white pipe with a cap on it. It should be right in front. Take the cap off and pour a mixture of very very hot water and clorox down the white pipe. Wait 10 minutes so the clorox has time to breakup the stuff that is bound up in the pipe. Flush that pipe with your garden hose. You will need to go outside and watch to see what is coming out of the white PVC pipe right next to outside unit. It will have a bunch of junk come out. All of a sudden the outside unit will kick on. Don't stop running the garden hose water until it runs outside nice and clean. This should be done ever six months to keep it from clogging the pipes. Don't call anyone until you try this.

Take a stick & spin the blade clockwise , if it takes off needs a capacitor, I keep a spare. Make sure it's not froze up.

Wolfe Refrigeration
 

If your compressor is coming on and the fan above it is not, you should turn your system off until a qualified company can check it out. Your compressor will kick off on high pressure. Likely your fan motor capacitor has failed or the motor itself. Save your compressor, its much more expensive.

Outdoor fan start capacitor is probably gone.

My experience with Munn's has been good. I have them check my unit once a year; cost is $79.95. I replace my own filters, so they do not charge me for those. My unit is almost four years old. When Munn's was here this past week for the annual service, my capacitor tested faulty/weak. Since the capacitor is warranted for ten years, and since they were here for the annual service, they replaced the capacitor at no cost and at no additional labor charge.

Bridget - Love the advice! Doya know where I can find an extra installer and where to keep that? LOLOLOLOL

Your unit may have a reset button which may work

We have our unit serviced in the spring and fall. Did this where we lived before TV and our unit was still working after 17 years. Just like your car you need to have the A/C unit serviced regularly to get the maximum life from it.

If it's the compressor I have a new (spare) capacitor & a new relay (contactor) if you need it and can't get service assuming it's compatible with yours. Just replaced mine last year and always have one "in stock" as our A/C is ~13yrs old.

call ac emergency service - they will come out and charge 80.00 bucks just to look at it. Probably needs a capacitor which can be bought for $ 30 dollars and put it in yourself if you are handy. Or maybe wait till monday