Was the new light switch for 12V? Both are available, and it might make a difference in how hot the rheostat gets. It will always get warm, as it's a resistance device, but operating a 12V rheostat on 6V could be the cause.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
