The Stovebolt Site Forums The Shop Area The Electrical Bay Anybody use one of these?

I rewired my truck to 12v but the heater motor is still 6v. Classic Parts said that this Voltage Reducer would work. It works fine but it is SO hot (I mean real hot) that it burned me when I touched it. I know, I know, don't touch it, but I want to make sure this is expected when stepping down the voltage.
Anyone have any other experience?

The heat is normal and expected. You have chosen to use a resistive type devce (resistor) to "scrub" of the extra voltage. It does this by converting the voltage into heat, P=IxE or watts(heat)= current x voltage. The other way is to use semiconductors or transistors with a simple circuit. The transistors have to be somewhat large (expensive) to handle the the current but the heat is not there.

I purchased that very same reducer but thought better of it and got a 12 volt motor. I don't like that kind of heat up in there with all those wires.