Every year at this time I wonder how I can capture the heat from the red hot 12-volt to 6-volt heater fan resistor for my defrosters.

I have converted to 12-volt and, with the original 6-volt fan motor, the required resistor can get red hot.

Has anyone put this resistor in a metal box which is in line with the defroster tubing? I'd get a much faster, almost immediate, defrosting with this.

Last edited by Wally / Montana; 11/22/2011 4:01 AM.

1948 3/4-Ton 5-Window Flatbed Chevrolet

34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.