Bill, this is a helpful link. The marketing materials, including the page you link to, are usually easier to read and understand than the Limited Warranty Statement that's in the trailer manual. But the Limited Warranty Statement, which is the official warranty statement, explicitly denies any warranties other than what it describes; which would include denial of what's in the marketing materials if they conflict with the Limited Warranty Statement. Hopefully there are no conflicts. But it's important to understand that coverage can change over time. Someone finding a page like this 2 or 3 years after its creation may find that something it says is in conflict with the official Limited Warranty Statement that came with your trailer.
The warranty statement directs owners to take the RV to an authorized Heartland dealer to remedy a defect. When Customer Service authorizes a servicer that is not an authorized Heartland dealer. it's an "accommodation" or "goodwill" gesture. It's not part of the warranty.
Earlier this year we looked at replacement windows for our house. The marketing materials had impressive warranty promises. I asked for a copy of the Limited Warranty Statement and discovered that 4 of the key promises were in direct conflict with the official warranty. I had them add the 4 promises to the sales contract. And a few years ago, before signing a 5 year contract with Comcast Business for a very expensive fiber optic business line, I discovered that their official warranty statement had unstated limitations on data usage. I had them add to the terms of the contract that our data usage was unlimited.
I'm probably the only person who reads warranty statements before signing. I find conflicts all the time.