Do you need to cover your air conditioner in winter
Isabella Turner
Updated on March 25, 2026
Outdoor cooling units are built to endure these harsh winter weather conditions, which eliminates the need for a cover. Moisture (water) can freeze the air conditioner’s condenser coils, which can cause damage over time. However, there is no way to keep moisture out 100% of the time.
Do you need to cover your air conditioner in the winter?
Outdoor cooling units are built to endure these harsh winter weather conditions, which eliminates the need for a cover. Moisture (water) can freeze the air conditioner’s condenser coils, which can cause damage over time. However, there is no way to keep moisture out 100% of the time.
How do you protect an air conditioner in the winter?
- Use a cover made of breathable material.
- Put plywood over the top of the unit only to shield from snow and ice, weighing it down with bricks or rocks to keep in place.
- Install a wood awning or shelter attached to the building that covers the top of the unit.
What happens if you dont cover AC in winter?
Covering your air conditioner will block proper air flow which can lead to mold growth on your evaporator coils. The mold can block proper airflow through your coils and decrease your air conditioner’s efficiency.Can I leave my AC outside during winter?
Before placing it in the box, wrap a plastic bag or garbage bag around the unit to further protect it. The unit should be stored indoors, and ideally in an attic or basement. Don’t store a unit outside, as that further subjects it to the elements.
What temperature should AC be set at in winter?
Set your thermostat to 68 degrees Fahrenheit in the winter According to ENERGY STAR, setting your thermostat to 68 degrees Fahrenheit (20 degrees Celsius) when you’re home is the ideal balance of comfort and energy efficiency.
Is it OK to leave window AC in winter?
We recommend you remove any air conditioner from a window location. During the winter months, heat could escape through the accordion extension panels on the A/C and the chassis; cold air could also infiltrate your home the same way.
How do I protect my outside AC unit from rain?
- Cover Your HVAC. Two of the biggest enemies for HVAC units are hail and debris. …
- Avoid Using Your HVAC During A Storm. …
- Install Your HVAC In An Elevated Area. …
- Keep Your Yard Spotless. …
- Inspect Your Unit Before Turning It On. …
- ABC Can Protect Your Biggest Investment.
Do I need to cover my AC unit when it rains?
In most cases, the condenser unit should never be covered. Rain cannot harm the condenser, as long as the moisture can evaporate freely, and neither can the cooler weather of a Florida winter. … Otherwise, simply keep the condenser free of debris, and rinse the dirt out periodically.
Does shading your AC unit help?Energy.gov confidently states that “shading the outside unit can increase its efficiency by up to 10%.” Even house-savvy BobVila.com proclaims, “Shading your air conditioner can reduce energy costs by as much as 50 percent.” … AC condensers have a harder time blowing heat from their coolant when it’s hot outside.
Article first time published onCan Snow mess up your air conditioner?
Don’t Let Snow and Ice Build Up When snow or ice starts to encapsulate your HVAC unit, your system could freeze or emergency shutdown. If this occurs, then your home will no longer receive heat, and the pipes in your home might start to freeze as well, causing plumbing problems.
Will snow damage my air conditioner?
Your air conditioner can handle some snow without any problems, but damage can occur when you get a lingering build-up of ice. Snow piles onto the coil and other internal parts of the outdoor unit, putting things at risk of rust and corrosion.
Can I put a roof over my air conditioner?
The simple answer is anything you would put over the top of that condenser/compressor unit to lower the noise level and placed so as to not restrict airflow would be at such a height that it would be useless for the purposes intended.
Is 65 too cold for AC?
HVAC manufacturers typically advise users not to run their units for extended periods if the temperature is below 65 degrees Fahrenheit. If you need to test your unit, you should do so after the weather has been risen to 60 degrees Fahrenheit for at least three days.
What happens if you turn on AC in winter?
When running an air conditioner in the winter, the unit reverses its function and fills your space up with warm air instead of cold—saving you the cost of getting a separate heating system. So yes, air conditioners do indeed work in winter.
What happens if you run AC with cover on?
Running an air conditioner with its cover on doesn’t allow for this exchange of heat and condensation. It will put undo stress on the unit, which can damage internal components that keep the air conditioner running. Leaving the cover on can cause the unit to overheat since the heat has nowhere to go.
What is the coldest temperature for an air conditioner?
Air conditioners are not designed to operate in or produce temperatures below 60 degrees. Truth be told, they’re happiest around the 68 degree mark. Most thermostats simply won’t allow you to choose a setting below this mark.
Is it better to leave thermostat at one temperature?
But as it turns out, the only real pro to keeping your thermostat one temperature is convenience. Sure, when you’re away on vacation or gone for the weekend, the consistent temperature is efficient, but when you’re at home, there’s really no additional benefits.
What temperature is too cold for a house?
The World Health Organization (WHO) recommends setting your thermostat no lower than 64 degrees (F) in the Winter months while people are in the home. If there are infants or elderly individuals, they recommend keeping the temperature at 70 degrees at a minimum.
What should I set my thermostat to in the winter at night?
- When Home: 68-70 degrees Fahrenheit.
- When Sleeping: 65 degrees Fahrenheit.
- When You’re Away: 65 degrees Fahrenheit.
- Adjust thermostat in 5-8 degree increments.
Can you hose down air conditioner?
You should absolutely hose down your air conditioner if you have the means to do so. … Simply hose the unit down with a hard stream of water from top to bottom to ensure it is free from anything that could get trapped inside and cause a troublesome clog.
Is it okay to cover the back of aircon?
Many homeowners prefer to cover their AC units for the winter if their internal parts are exposed. Avoid covering your unit with plastic wraps or garbage bags because the moisture from the condensation can stay trapped inside rusting and corroding metal parts. It is advised to use a covering that allows ventilation.
Should I turn off my AC during a thunderstorm?
A protection system can help prevent damage to your AC unit, especially in the event of a thunderstorm. … Even so, they’re not guaranteed to be absolutely effective at preventing surges, which means turning off your AC during a thunderstorm is still the best idea.
Is it okay for aircon to get wet by rain?
While rain will not damage your air conditioner, deep standing water could. If there is more than about 15 inches of water, the moving parts and electrical components may not be able to operate. After the water recedes, it’s best to call an HVAC contractor to check the unit before you restart it.
How do you cover an outside AC unit?
Hiding your air conditioner using a cover might cause overheating. To prevent this issue, you can create an air conditioner camouflage by placing plants around the outside unit. This will keep the outdoor cool and protect your air conditioner from sunlight.
Does rain ruin window AC?
Rain does not affect your window air conditioner. It won’t damage it or change the performance. The electrical components in an AC are sealed, keeping them from water damage. The only real risk to an AC is standing water, such as in a flood.
Is it better to leave AC fan on or auto?
Keeping your fan on AUTO is the most energy-efficient option. The fan only runs when the system is on and not continuously. … If your fan runs continuously, moisture does not have a chance to drip outside. It blows back into your home and your AC works hard to remove extra moisture from the air.
Is it cheaper to leave air conditioner on all day?
In general, it is cheaper to leave the AC on all day during very hot temperatures. … After even just a couple of hours, your AC will have to work hard to lower the temperature back to a comfortable level. This can take a long time and place too much strain on the system.
How do I keep my outside AC unit cool?
Shading the entire side of your house and the outdoor air-conditioner unit is most effective. This can be done with trees or an awning. Particularly with a brick, masonry or stucco house, the house wall acts like a huge solar collector and actually raises the temperature of the air around the air conditioner.
Why is my HVAC covered in ice?
Ice can form on your air conditioner or heat pump in any weather if the refrigerant inside it falls below freezing. Ice on your HVAC unit wastes energy, and it can cause damage or failure. … Some of the most common causes of ice on an HVAC unit are low refrigerant levels, faulty wiring, and a dirty air filter or coil.
Do you need to cover heat pump in winter?
No, do not cover your heat pump in winter! To function properly, a heat pump needs to pull in the outdoor air through the side vents and exhaust through the top of the unit. If you cover your heat pump, it may not operate as designed and may cause damage to the system.