Should I cover my AC unit in cold weather?
Instead of covering your AC unit, it is best to place a piece of lumber across the top to protect against falling ice and snow, says Pharo. (Photo courtesy of Angie's List member Lynn D. of Liverpool, N.Y.)
Date Published: Sep 26 2013
by Clint Pharo of Pharo Heating and Cooling
Every autumn as the leaves drop and the cold temperatures roll in, homeowners start thinking about winterizing their homes and yards. But what about their air conditioners?
Our customers often ask us whether they should be covering their air conditioners during the winter to protect them from the winter elements. Unfortunately, there is no perfect answer to this question as there are pros and cons to both covering and leaving it uncovered.
While covering your air conditioner may keep it looking a little better in the long run, doing so can create a perfect habitat for critters, such as mice. These freeloaders like to use your covered up air conditioner as luxury living space to get out of the harsh winter conditions and may make Swiss cheese out of the wiring and other components in the unit.
Every spring, we arrive at several service calls for air conditioners not working to find exactly that. This can lead to expensive repairs that might not have happened if the unit was left uncovered.
On the other hand, we also have had to replace the top portion of the air conditioner due to ice and other debris falling on them from the roof, which may have been protected if covered. So you ask what we would recommend?
The answer to this may vary depending on a few conditions, like where you live. If you live in Florida where your air could be running a good portion of the year, then it really doesn’t make sense to be covering it, but here in Wisconsin where the temperatures can fall well below zero degrees and we can have feet of snow, it may be worth considering some sort of shelter.
In our opinion, it is best to leave the unit uncovered as we see more repairs in the spring for units that are covered. However, if you have ice that often forms on the roof above your air conditioner, then we recommend putting a piece of plywood over the top of it to reduce the possibility of damage from it falling.
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