My A/C is blowing hot air. I have taken it to two shops who both say the compressor is kicking on and the coolant levels were all at the right spots. It is a 2005 dodge durango, by the way. When i start the durango, the compressor comes on and will not cycle off. I get that its like supply and demand and won't kick off until the interior temperature cools off, but thats just it. The a/c is blowing hot air only, no matter how long i let it run. When i rev the engine, it makes no difference in the air. I dont want to spend a fortune on this thing, i just want the air to work again.