[rheavn]

Maybe I read something into Larry's post that isn't true. Sounded to me that when he puts the coach in travel that the left rear raises 4" above ride height. That indicates to me that the ride height valve is accepting air when the left travel valve opens, but the ride height control valve is not closing when the coach reaches ride height. As the coach rises above ride height, air should be exhausted. If you disconnect the linkage you should be able to move it down & exhaust air. The fact that Larry could not manually exhaust any air when the coach is in travel mode & 4 inches above ride height leads me to believe he has a ride height control valve that has ceased working correctly. I would remove the valve & blow air in the inlet & see if I could shut off the inlet air & exhaust the inlet air by moving the linkage arm. If the ride height control valve fails that test then it would need replacement.

The fact that Larry could level the coach using the manual mode has no relationship to the ride height control valves as the leveling mode does not use the ride height control valves.