I wish I could answer that for you Huggy.
I've taken mine to Fitzgerald on Rockville Pike since I bought it. Let me put it this way, they never volunteered to do any warranty work. I had to press them to do my windows, something I would not have done had I not read the thousands of posts on this board and the old one.
I finally got one of the service managers to level with me. (Long story, but they tried to charge me for work that I knew was covered under warranty, agains because of this baord).