Problem overview
The AC/heater (HVAC) system may unexpectedly switch to the defrost mode when accelerating. This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops. There is also a revised vacuum check valve available to address this concern.
142 people reported this problem
40 commentsDodge Ram 1500 Van vehicles with this problem
Average mileage: 119,263 miles
(50,000 - 272,000)
Need a diagnosis? Trust our Dodge experts.
Oops! We got lost!
Your location cannot be detected. Please enter your zipcode for nearby shops.
Search for another problem
RepairPal ™Car Genius
Ask our experts about your Dodge.
RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.
