For those of you that have a working level up ... it's the "bee's knees". For those of you that have the problematic level up systems ( there are a growing number according to RV techs)... it's a bummer. Bad control boards ... bad level sensors ... improperly installed level sensors ... wiring harness that has come unplugged ... all possibilities. Some units work fine say hooking up to the truck, then the control board simply fails and you near can't get it off the truck once at the campsite. Carry the 1/4" allen adaptor that goes in the end of the pump motor and a drill motor. Learn which valves and how to manually close and open the valves so you can at least get the front cylinders to get you off the truck. There is more than one document for the level up, but page 11 on this one has the what to do with photos.
https://www.lci1.com/assets/content/...ideout-web.pdf