Same with my room. We were there this past Wednesday to Saturday. Stayed in building 3. My room was not cold at all and they came in and pulled apart the grate and replaced the filter, etc. Then, nice and cold. Almost too cold! the ceiling fan in the bathroom was also super noisy. they couldn't fix it at the same time that they fixed the air, but sent someone the next morning while we were at the parks and when we got back it wasn't noisy at all!
While we didn't walk around to every single area, we did have to walk past a few of the buildings to get to ours, and didn't see or hear any kind of construction at all.