My air works after the car has been going for a while. Sometimes it doesn't work at all. Is it a fuse? If so, which one?
What is air conditioning problem? on 2006 Dodge Charger
Sounds like the fan clutch is either going out or the fan has become blocked by a foreign object (i.e. a stick or the fan shroud is bent inwards) I would say that you should troubleshoot for this before you take it to a shop unless you already have.
A fuse problem will not cause this symptom. I'm not sure what the problem is, it will have to be looked at and diagnosed, or hopefully someone with direct experience with this vehicle might know what this is.
You have auto heat a/c in that R/T. The switch or the inside thermostat is bad. Take it to advance or auto zone and they will check codes for free,