Have RV Questions? Ask an RV Mechanic Online.
good morning my name is ***** ***** I will assist
yes, from getting the brakes hot, it sounds like the fluid may have boiled and introduces air into the system.
the first thing I would do is to bleed the system and see if it returns to normal. if it does, have the system checked for any issues with sticking calipers as well.
if the pedal does not return to normal, then most likely the master cylinder may have failed.