I attempted to turn up the fan and it didn't turn up. I could feel the heat coming out that usually flows out even when the blowers aren't running, but when I tried to turn the fan up, nothing happened. Every now and then when I went over a bump it would turn on but if I went over another bump, it would shut off again. The car was at the end of its life anyway but let's say it was a long, cold drive to the scrap yard.