I have a 1982 300TDT with 235,000 miles. My A/C works great until I stop and get out for 15 minutes. I left it run while I went into a store and came out and it was blowing full hot. I had the climate control set on minimum. It finally started to blow out cool air after about 15 minutes(city driving). It then takes another 30 to 40 minutes to cool the car back down. Heres what I have done. New Climate control unit last year,fixed the sensor tube, newair condiotioning compressor and drier(old one quit this winter). The climate control seems to work once it colls down (the fan lowers speed when cool). Any help would be greatly appreciated. Thanks