Hi Kevin,
The dealer may be confused about the magnetic reset. Norcold gas absorption refrigerators that get the backside splashed during washing sometimes need that.
For residential refrigerators, the only reset button is for the Inverter that changes 12V DC battery power to 120V AC power used by the refrigerator. You have a button in your control panel that's probably labeled "Magnum". That's for the inverter. It's a remote "ON" button. There's also a local "ON" button on the bottom of the Inverter.
You probably also have a separate cutoff switch between batteries and Inverter. You'll want to ensure that's also turned ON.
For more detailed information along with pictures, diagrams, and diagnostics, take a look at our owner-written Residential Refrigerator Guide in
this folder. You can also get there by clicking on the TOOLS tab at top of page and selecting HUG - Heartland User Guides.