I know why so many RV's employ HWH leveling jacks. They are backed by great customer service!
I recently had a failure requiring replacement of the main relay, pump motor and control board. Suspect the cracked and shorting relay damaged the other parts.
At any rate, talking to them by phone got me a speedy parts delivery and Leisure Tyme RV in Pensacola FL quickly completed the repair. I tried the levelers at the dealership and heard them start going down...assumed all was fixed.
6 hours and some 250 miles later, my left rear leveler would not go down, and the individual up arrows to adjust (fine tune) leveling would not work.
First thing the next morning, I called HWH for suggestions. I spoke with Steve and he walked me through things. He told me to remove the plastic see-through cover and remove/check a fuse on the left rear leveler. Fuse was OK, but when re-installed, all worked normally. All shocks went up and down as required. Evidently the fuse just was not making a good contact.
Many thanks to Steve and HWH for EXCELLENT after the sale support.