I replaced the fuse and the heat control switch, and still have no change in the problem.
Tech reminder: The smoke generator is not attached; I'm just working with the cabinet, with a power cord running directly to it from the wall.
I'm a bit confused about your advice on the multimeter. Where exactly do the leads of the multimeter go in order the check the continuity you're talking about. Just to see what I could learn, I put my multimeter on the lowest ohms setting, and placed the leads on the old heat control switch (now sitting on my table) where the wires connect. There was no continuity. I checked the switch on both low and high, and there was no continuity. Should there be? Does that mean this is a bad switch?
After I did this, I unplugged the new switch, and tested it the same way. No continuity.
But is there supposed to be continuity there?
At this point, I've replaced every part except the temp sensor. What do I do?
Someone also suggested I check for shorts. I can confirm it is definitely not wearing shorts of any kind. Seriously though, where would I put the leads to check something like that?