my ac works when it want's. it will start working and then stop and start blowing heat and then it may or may not work the next time. or it will start blowing hot and then blow cold for a bit. Any suggestion before I go to the dealership and get violated!!!

 

It could be 100 different things. But the most common is an AC relay which is about $20 from the dealer. Replace that and see if it improves. If the relay has been sticking and caused the AC to overcharge you could be low on r134a also.