Hi brucericco,
Welcome to the Heartland Owners Forum and Family. We have a great bunch of people here with lots of information and all willing to share if needed.
Hopefully you have checked the fuse or breaker on the system. I'm not sure about the landing gear, but do you have just one switch? I thought there might be two, one on or near the pump also.
I'm sure some one that has the system will jump in soon and help out.
Enjoy the forum.
Jim M