to the forums! Glad to have you on here.
Now, for the issue you're having. My dealer had informed me of a recall by the skylight manufacturer of some of the skylights. Mine wasn't recalled, but it's possible yours was. I'd have your dealer look into whether or not it could be covered under that.
I'm not sure on the FR warranty. Being a 2013 model it might have actually been manufactured in 2012, making the unit over 2 years old now. It'll all depend on when the warranty was activated. Again, your dealer should be able to help you with that.