Descaling first makes the most sense to me before doing anything else, i.e. taking apart and replacing parts, etc... Random thought here>>> anyone know if this machine has a 3 way solenoid valve, don't think
Could be the steam thermostat needs to be replaced, that's why it's overheating?
Anyhow as far as Espresso machine repair in NY, here's on oldie but goodie.... Rudy's L & R Espresso Machine Co 464 West 51 Street NY, NY 10019. I don't know their phone # but they don't answer their phone much anyhow

. They've been around for a while. Don't know if they work on
Le FRANCIS FRANCIS but it's worth a shot. Good luck