Can only speak to the 53-54 years but they have 3 (THREE) separate fans. One each for AC, Heater, and Defroster. You can run all 3 at the same time if you want. Kerryp --- JHPLC@xxxxxxx wrote: > On the 53-56 cars with A/C...can you run the heater > and the A/C at the same > time??? > > > > Jerry > 68 Crown (90-92) > 65 'Vert...(96-97) > >