Reply to "JLC Big Boy smoke unit"

I don't see any physical damage to the PCB, and since the fan works, there's nothing on the PCB to prevent the smoke resistor from heating.  I can see the traces from the GND & HTR pins and they're fine.

Let's start with the basics, measure the resistance of the smoke resistor and tell us what you get.  With this unit, I'd put the 8 ohm resistor in, and also you have to make SURE those screws/nuts are tight, that's a frequent cause if issues.  another thing, make sure when you reassemble it that the smoke resistor does not touch the sides of the smoke chamber.

You don't need a new smoke unit.