Dodge Repair Questions? Ask a Mechanic for Answers ASAP
You should have them take the temps on the heater hoses at the firewall. If the temps are good the problem is inside. If they are not good you have problems with the engine making enough heat.
The doors under that dash that change from hot to cold can be recalibrated with the factory DRBIII scan tool at a dealer if the problem is on the inside.