THERE IS AN ELECTRICAL SMELL WHEN USING THE HEATER, THE WINDOW WILL NOT DEFROST CAUSING THE ENTIRE CAR TO FOG UP MAKING VISIBILITY IMPOSSIBLE ESPECIALLY WHEN IT IS RAINING , 4 TIMES THE VEHICLE HAS FILLED UP WITH SMOKE DUE TO THE OIL FILTER NOT FUNCTIONING CORRECTLY, ON OCCASION IT LOOKS LIKE THE VEHICLE IS ON FIRE WHEN IT STARTS SMOKING FROM THE OUT SIDE. *TR