Solution: paid to have repair man fix it....but I watched.
I read in multiple spots that I needed to clean out the unit as it was mostly clogged with spider webs. The problem was that I didn't know how to do that. I watched a video on YouTube that showed someone pulling out the entire burner unit and cleaning out the jets. That struck me like much more than I was capable of, so that's why I paid for a repair. As it turns out that wasn't needed and wasn't done. Other than the normal vacuum out junk steps in the maintenance visit, the repair man pulled out his handy coat hanger. I read others saying that you could clean out the unit with a coat hanger, but I just didn't see where I was supposed to do what I was trying to do. As it turns out, where the jets meet the tubes that distribute the flame, there is a little nook where you can insert a coat hanger and plunge the tube clean. After plunging the first one he pulled out what looked like a lollipop of cobwebs on the end of the hanger.....problem solved. He cleaned the rest and fixed the damage done to the flame rollover sensor and I was back in business.
So, what did we learn? Every year before firing up the heater for the first time, I should use a coat hanger and plunge the tubes to make sure this doesn't happen again.
-Snewo