WASHINGTON, D.C. --- Chrysler is recalling 37,407 MY 2009 Dodge Ram light-duty pickup trucks equipped with manual temperature control only. 

The software programmed into the heating ventilation and air conditioning module may cause the windshield defrosting and defogging functions to become inoperative, according to the National Highway Traffic Safety Administration's website. This condition can decrease the driver's visibility under certain driving conditions, creating the risk of a crash. 

To remedy the problem, dealers will reprogram the HVAC module free of charge. The recall is expected to begin in June. 

Vehicle owners may contact Chrysler at (800) 835-1403