Recommend you check check the controller and see if it's flashing an error code that may lead to a fix. Given all the previous work it's also possible you've got a low/no voltage issue - we finally found our issue behind the main fuse block, a loose wire (my block is at the rear driver side compartment door along with the starting batteries and DEF container). A call to Winnebago may also help - given the history of Lippert slide issues they appear to be more flexible about warranty timelines (see many comments in IRV posts). Best wishes...let us know what results so we can all learn.
Welcome to IRV2 and a new set of friends! Safe travels...
2015 Itasca Ellipse | 2014 Jeep Grand Cherokee