As you later found a primary short: Did you really prevent fire by turning off/unplugging the soldering station? Or did the mains fuse of your lab socket break the circuit? Or did the primary short happen later?
We still have a WTCP-S and an EC-2002 antistatic. Both with a primary side fuse at the front near the mains switch. The stations were kept alive by fixing them multiple times over the years. The WCTP-S is about 40 years old and got a mosfet reenforcement for the temperature switch inside its soldering iron, as that switch would burn under load and cause trouble. The EC-2002 was recapped in 2019.
Regards, Dieter