I DON'T HAVE AN APPROXIMATE DATE ON THE FAILURE. IT DID JUST START RECENTLY. MY 2001 JEEP GRAND CHEROKEE HAS NO HEAT ON THE DRIVERS SIDE. THIS IS DUE TO FAULTY BLEND DOORS AND RECIRC DOORS (AFTER EXTENSIVE RESEARCH, I HAVE FOUND THIS IS A VERY COMMON PROBLEM ON WJ JEEPS. ON MY RIDE HOME TONIGHT (BELOW FREEZING WEATHER), I BECAME VERY HYPOTHERMIC. EVEN AFTER HOT SHOWER, I AM STILL SUFFERING EFFECTS. ALSO, ON A PREVIOUS OCCASION, MY FRONT WINDOW FORMED ICE, AND HAD TO PULL OVER. THERE WAS NO HEAT ON DEFROST. DIDN'T HELP THAT IT WAS DARK AT 0500, AND SNOWING QUITE HARD. CHRYSLER KNOWS ABOUT THIS PROBLEM, BUT BRUSH IT ASIDE AS MERELY A COMFORT ISSUE. I GUESS THAT IS AN EASY STATEMENT TO MAKE FROM A WARM OFFICE AND NOT IN AN ACTUAL CAR WITH THIS PROBLEM IN RURAL MONTANA IN ONE OF OUR HARDEST WINTERS. *TR