Havent had mine catch on fire, but it did do the common fault and melt the harness on the back of the switch for the blower motor, I had to replace the harness with a new pigtail, then did the JP Mag fix and wired in some relays for the blower motor to prevent if from overheating the wires.
See a lot of issues on the forums with switches & connectors burning-up, even had a mode switch & connector do a smoke-test on my own stuff. Haven't seen any issues with them actually catching on fire, though.
2000 Wrangler Sport - "Red" - Stock
1999 Z-28 - "The GLUMAKR" - Not Stock
"Mid-life crisis? Pfffffttt... more like a whole-life crisis."