Bird building a nest in my AC Unit. - Event Date: 08 May 2016

Has anyone had this issue before?? A bird built a nest in the roof top AC Unit on my new 179 unit. I had to take the AC cover off and remove the nest, it wasn't easy trying to keep the eggs intact. Doubtful Mother bird will come back after I put the nest in a near by shrub. But I plan on taking the POD out in less than 2 weeks, so it had to go. So in the bottom of the ac unit it has some holes probably for air venting, this is where the bird got under and inside the unit. I was thinking about putting some window type screen over those holes. ANY ONE KNOW IF THAT WOULD AFFECT HOW THE AC UNIT RUNS, OR IS THERE A BETTE FIX??? THANK YOU.