general problems of the 2001 Dodge Ram 1500

The contact owns a 2001 Dodge Ram 1500. The contact stated that the defroster is inoperative, which reduces her visibility. She took the vehicle to the dealer and they replaced the evaporator box. One year later, the failure resurfaced. She took the vehicle back to the dealer and they stated that they could not identify the cause of the failure. Currently, the remedy has not been identified to properly correct the failure. The manufacturer referred her to a dealer. The failure mileage was 60,000 and current mileage was 71,000.