No. At Air Conditioning Advisory Center, we do not recommend covering your air conditioners during winter, as it can cause more harm than good. Covering them does not really protect it from dust, as it does not get dirty when it is not being used.
Also, a lot of people forget to remove the covers from them before they begin to turn in on during spring and summer. Covers can also trap moisture which can lead to the damage of your unit. Our expert technicians can provide you with maintenance tips for your air conditioner.