Do You Need to Cover Your Air Conditioner in Winter? The Definitive Guide
The simple answer is: generally, yes, you should cover your outdoor air conditioning unit during the winter months, especially in regions experiencing harsh weather conditions. While modern units are built to withstand some exposure, covering your AC unit offers significant protection against the elements, potentially extending its lifespan and preventing costly repairs.
Understanding the Winter Hazards to Your Air Conditioner
Leaving your AC unit exposed to the harsh elements of winter can lead to several problems. Identifying these potential hazards is crucial in understanding why covering your unit is often recommended.
Ice and Snow Accumulation
The accumulation of ice and snow is perhaps the most obvious threat. When water freezes, it expands, potentially damaging the delicate fins on the condenser coil. Repeated freezing and thawing cycles can further exacerbate this damage, leading to reduced efficiency and eventual failure of the unit. Heavy snow loads can also physically strain the components, leading to bending or breakage.
Debris and Pests
Winter winds can carry debris like leaves, twigs, and dirt, which can accumulate inside the unit. This debris can clog the coil, impeding airflow and hindering its performance. Furthermore, the shelter provided by the unit can attract pests like rodents and insects seeking warmth and shelter. These unwelcome guests can damage wiring and other components, leading to electrical issues and further complications.
Corrosion
Exposure to salt, rain, and snow can accelerate corrosion of the metal components of your AC unit. In coastal areas, the problem is even more pronounced due to the high concentration of salt in the air. Corrosion weakens the metal, leading to leaks, cracks, and eventual breakdown of the unit.
The Benefits of Covering Your AC Unit
Covering your AC unit during the winter offers several advantages, primarily focusing on protection and preservation.
Preventing Physical Damage
A cover acts as a barrier against the elements, preventing snow, ice, and debris from directly impacting the unit. This helps protect the delicate fins, coils, and other components from physical damage, extending their lifespan.
Reducing Corrosion
By shielding the unit from rain, snow, and salt spray, a cover reduces the rate of corrosion. This is particularly important in coastal areas where the air is saturated with salt.
Deterring Pests
A well-fitted cover can help prevent pests from entering the unit and causing damage. It denies them access to a warm, sheltered environment, encouraging them to seek shelter elsewhere.
Potential Cost Savings
While the cost of a cover might seem like an unnecessary expense, it can potentially save you money in the long run. By protecting your AC unit from damage, you can reduce the risk of costly repairs and extend its lifespan, delaying the need for a replacement.
Choosing the Right AC Cover
Not all covers are created equal. Selecting the right type of cover is important to ensure effective protection without causing any harm to your unit.
Breathable Materials
It’s crucial to choose a cover made from a breathable material like canvas or a specialized AC cover fabric. This allows air to circulate, preventing moisture from becoming trapped inside the unit, which could lead to mold growth or corrosion. Avoid using plastic or vinyl covers, as they can trap moisture and create a humid environment.
Proper Fit
The cover should fit snugly but not too tightly around the unit. A loose-fitting cover can be blown away by the wind, while a too-tight cover can restrict airflow and potentially damage the unit. Look for covers specifically designed for AC units, or consider having one custom-made for a perfect fit.
Durability
Choose a cover made from a durable material that can withstand the elements. Look for covers that are waterproof, UV-resistant, and tear-resistant.
Frequently Asked Questions (FAQs)
Here are some frequently asked questions to further clarify the need for covering your AC unit during the winter:
FAQ 1: Does my AC unit’s warranty cover winter damage?
Most AC unit warranties cover manufacturing defects and malfunctions under normal operating conditions. Damage caused by weather events or improper maintenance, including neglecting to protect the unit during winter, is typically not covered. Always review your warranty details carefully.
FAQ 2: Can I use a tarp to cover my AC unit?
While a tarp might seem like a cost-effective solution, using a tarp is generally not recommended. Tarps are typically made of non-breathable materials, which can trap moisture and lead to corrosion.
FAQ 3: Should I completely seal my AC unit when covering it?
No, you should not completely seal your AC unit. Allowing for some airflow is important to prevent moisture buildup. The cover should protect the top and sides but ideally leave the bottom slightly open.
FAQ 4: When should I put the AC cover on and take it off?
Put the cover on when temperatures consistently drop below freezing and before the first snowfall. Remove the cover in the spring when temperatures consistently remain above freezing and the risk of snow or ice is minimal.
FAQ 5: Does covering my AC unit void the warranty?
Covering your AC unit will generally not void the warranty, unless the cover itself causes damage, such as using a non-breathable material that traps moisture and promotes corrosion. Always check your warranty terms to be certain.
FAQ 6: What about covering the AC unit with plywood?
Using plywood is not recommended. Like tarps, plywood can trap moisture and prevent airflow. It can also attract pests and become a breeding ground for mold.
FAQ 7: Is it necessary to clean my AC unit before covering it?
Yes, it’s highly recommended to clean your AC unit before covering it. Remove any leaves, twigs, or other debris that may have accumulated inside or around the unit. This will prevent the debris from causing corrosion or attracting pests.
FAQ 8: Can I run my AC unit with the cover on?
Absolutely not. Never run your AC unit with the cover on. This will restrict airflow and can cause the unit to overheat and potentially damage its components.
FAQ 9: Will covering my AC unit prevent all damage?
While a cover offers significant protection, it cannot guarantee complete protection against all types of damage. Extreme weather events, such as severe ice storms, can still cause damage despite the cover.
FAQ 10: Are there any alternatives to covering my AC unit?
If you choose not to cover your AC unit, you can still take steps to protect it. Regularly remove snow and ice accumulation, clear away debris, and consider applying a rust-inhibiting coating to the metal components.
FAQ 11: How much does a good AC unit cover cost?
The cost of an AC unit cover can vary depending on the size, material, and quality. Expect to pay anywhere from $20 to $100 or more for a durable, breathable cover that fits your unit properly.
FAQ 12: Where can I purchase an AC unit cover?
You can purchase AC unit covers at most home improvement stores, hardware stores, and online retailers like Amazon. Be sure to measure your AC unit before purchasing a cover to ensure a proper fit.
By taking the time to properly cover your AC unit during the winter, you can protect your investment and ensure it operates efficiently for years to come. Remember to choose a breathable cover, ensure a proper fit, and clean the unit before covering it. Following these simple steps can help you avoid costly repairs and extend the lifespan of your air conditioning system.