Hi I really need help. I have a 2008 dodge nitro sxt. I've been having heating problems for a while, after getting it flushed it starts working but after awhile stops. My AC stopped working when I had to put a new compressor on. It started out cold but after a couple of hours started blowing out warm air. Just got a new radiator/hoses and a thermostat put on and still doesn't work. Need to know what else should I get done.