CAR HAS NAUSEATING SMELL WHEN AIR CONDITIONER/HEATER IS ON. AIR CONDITIONER OVERHAULED AT MY EXPENSE JULY 26, 2017. SMELL REMAINS, ALTHOUGH SLIGHTLY BETTER AT TIMES. SMELL IS A CROSS BETWEEN BURNED ROPE/URINE-TYPE SMELL. IF DRIVING ALL DAY, OR LONG DISTANCES, I GET A HEADACHE. PLEASE RESPOND