No, you don’t need to cover your AC unit during the fall or winter in Michigan. AC units are made to withstand the snow and cold, and covering your air conditioner can lead to issues of mold or rust. Covering the unit can also attract critters, giving them a shelter from the rain and snow. Additionally, we have seen homeowners forget that the cover is on, and when they turn their unit on during that first hot day, it causes damages resulting in major AC unit repairs, if not replacement of the unit itself.