Four problems related to defogger have been reported for the 2003 Dodge Ram 1500. The most recently reported issues are listed below.
Defrost vent won't work every other setting works fine.
There is a defect in Dodge ram truck recirculation doors, inside the duct work. The plastic door breaks where the hinge holds it. The door then falls over the interior fan and causes the air flow to stop. A telltale sign is the fan making a roaring noise with little or no air flowing.
: the contact stated the windshield and front seat windows would not defrost. The vehicle was driven to the dealer, who could find no problem.
My 2003 Dodge Ram 1500 4x4 truck has an issue with the air selector. I cannot defrost my windshield or warm the floor. It is broken with air blowing out of the vents to my face. My vehicle was fixed once before for the same problem. There are also many forums or posts in reference to the problem. Dodge has made a poor design which is faulty and expensive to fix. I believe there should be a countrywide recall to fix the problem and upgrade the plastic doors Dodge uses for the heat/ a/c system.