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1937 Studebaker Heater Switch

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Hi all,


I am working on my 37 Dictator 5A.  It has the factory installed under dash heater by the passenger side as was common for the era.  It has a ceramic rheostat type switch to adjust the heater fan speed.  All works as should, but the back of the switch gets hot to the touch.  I don’t know if it’s due to original wiring, poor ground, or just the way it is.  Was the switch designed to get hot (since it is ceramic)?  I did run a redundant ground from the dash to the body.  I have a all new wiring harness for the car but the heater wires are original because no one makes replacements.  Should I replace the switch?  Thanks.



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