It has happened twice in the last year that I heard a loud noise coming from our A/C unit outside as if there was a rock banging around inside. Both times it turned out that a poor snake had crawled inside and was killed by the spinning blade. We have also found dead lizards and frogs inside as well. It is a terrible death for the poor animals to be cut into small bits by the spinning fan blade, and it also stinks when the corpses are rotting in the bottom of the A/C.
I started looking around and couldn’t find anything specifically to keep critters out of air conditioners. I did find this Air Conditioner Cover on Amazon.com to keep leaves out and decided to give it a try. The product has some good reviews but none of the reviews nor the product description itself mention anything about keeping snakes or other animals out. It turns out that it works perfectly:
The cover has been on the A/C unit for several months now and there is no way a snake, frog or lizard can get into it anymore. The four bungee cords hold the cover tight so that nothing can crawl under. On the sides and bottom I don’t see any openings where animals could crawl in either. I love this product and recommend it to anyone who has this problem. As a bonus it also keeps leaves out so the inside stays nice and clean. You can get this air conditioner cover on Amazon. I highly recommend it.