[Richard and Rhonda]

Russ, not necessarily, on your conclusion that air exhausting from the leveling valve means a leaking solenoid.

Study the HWH manual carefull on the schematic. Coach air goes to the leveling valve, through the solenoids, and on to the air bags. If the valve body is leaking, then the solenoid has no effect. The coach supply air will drain quickly. Your brake air should stay up because of the check valves between the systems.