Garageguy6078, does your switch have more than two positions? Does it just go click, or click-click-click? Or does it just go smoothly between upper and lower positions.
The resistor on the back leads me to believe it gave the heater more than one speed. Or if it works smoothly instead of clicking, it may be fully adjustable in fan speed.
You could check at the terminals with an ohmmeter while operating the switch. If the resistance changes in steps or varies between off and full on, that would be an adjustable speed switch.
