Hi RhettM,
Welcome to the Heartland Owners Forum and Family. We have a great bunch of people here with lots of information and all willing to help when needed.
Sorry your having problems with your T/S. Was it working OK when you picked up the unit and did the PDI? If it was, has it been setting at your place for a while and now it blows the fuse? My guess is if it did work and has been setting, even for a few days, you might have some uninvited guest maybe visiting and making a nest somewhere. If it was working when you left your dealer and then started blowing the fuse on the way home, then I would think you have a wiring problem somewhere. Did the dealer install the connector plug or is it one that has been in use?
Enjoy the forum and let us know what you find. I'm sure some others will give some ideas also.
Jim M