My bighorn 37qb is back at the Heartlands facility in Indiana right now. I had 4 bubbles in the fiberglass. Heartland picked it up from the dealership, and will drop it off at my house when the work is complete. No problems with the warranty so far. I still have a few months left on my factory warranty to make sure no other exterior issues come up. After that, I purchased a 5 year extended warranty. Hope I don't need it!. If it is under warranty, contact Heartland! I hope there wasn't a bunch of rv's that have this problem.