Will be inspecting both my ac units today. Unit has been in service since last November so going to inspect filters anyway as ac's have gotten a lot of use this summer. We will see what happens. Just got new door lock mechanism in yesterday from Bauer due to getting locked in fifth wheeler last week. Replaced that mechanism and it works so quietly each and every time. I don't know what improvements they have made but I can tell a noticeable difference in operation from the old to the new.