AC/Heat issues
 

We have a 2009 T/C. We are currently experiencing AC & Heat issues with the vehicle. Driving around and through town we have no problems with the A/C or heat, however when we drive the vehicle on the highway for anywhere near 2 hours or more the fan will stop working.

This has happened with AC in the summer and heat in the winter when driving on the highway. We also experienced during the winter in a rainy downpour that the defroster would'nt defrost the windshield.

Any assistance in this problem would be greatly appreciated!