I HAVE A 2012 DODGE AVENGER V6 WITH ONLY THE DRIVER SIDE HEAT WORKING. UPON FURTHER INVESTIGATION AS TO WHAT CAUSED IT THERE IS SAND PARTIALS IN THE COOLING SYSTEM FROM THE SAND FORGING OF THE MOTOR AND WHERE THERE WAS NOT PROPER FLUSHING OF THE COOLING SYSTEM BEFORE THE ASSEMBLY OF THE MOTOR. IT IS A CLOSED SYSTEM SO THERE IS NO WAY THAT SAND PARTIALS CAN ENTER THE SYSTEM AND CAUSE THAT ISSUE. DODGE BELIEVES THERE IS NO SAFETY ISSUE WITH IT AND IT IS A "CREATURE COMFORT", BUT WHEN IN FACE THE HEAT DEFROSTS THE WINDOWS TO ENABLE VISIBILITY. WITH NO HEAT ON THE PASSENGER SIDE OF VEHICLE THE PASSENGER SIDE AND SOME OF THE DRIVER SIDE IS UNABLE TO DEFOG, DEFROST, OR MELT ANY ICE OBSTRUCTING THE VIEW OF THE DRIVER. THIS IS NOT A DRIVER ISSUE, THIS IS A MANUFACTURING ISSUE THAT NEEDS TO BE RESOLVED.