As the temperatures drop and winter sets in, many homeowners with window air conditioning units face a common question: should I leave your A/C unit in the window or is it better to remove it?
While keeping it installed might seem convenient, there are several factors to consider, from potential damage to energy efficiency. In this blog post, we’ll explore what happens if you leave your A/C unit in place during winter, whether you should remove it and how to protect it if you decide to keep it installed.
What happens if I leave your A/C in the window?
Leaving yourwindow A/C unit installed during the winter can lead to several issues that may affect your home’s comfort, energy efficiency and the lifespan of your air conditioner.
1. Exposure to cold and moisture damage
Window A/C units are not designed to withstand prolonged exposure to freezing temperatures, snow and ice. Moisture from snow or rain can seep into the unit and freeze, potentially damaging internal components like coils and fans.
Over time, this exposure can lead to rust, corrosion, or even permanent damage that may render the unit inoperable when summer returns. Freezing temperatures can cause significant damage to a window A/C unit. When exposed to cold weather:
- Moisture inside the unit can freeze and expand, damaging coils and other internal components;
- Lubricants in moving parts like fans or compressors may thicken in low temperatures, leading to operational strain or failure;
- Repeated freeze-thaw cycles can weaken seals and connections within the unit over time.
2. Increased drafts and higher energy bills
Window air conditioners rarely form a perfect seal with the window frame. During winter, this gap allows cold air to seep into your home while warm air escapes. This creates drafts that make your heating system work harder to maintain a comfortable temperature, leading to higher energy bills. Even with insulation or covers, these inefficiencies are difficult to eliminate entirely.
3. Risk of pests entering through gaps
The small gaps around a window A/C unit can also serve as entry points for pests seeking warmth during winter. Rodents or insects may find their way into your home through these openings or even nest inside the unit itself, causing further damage and hygiene concerns.
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Should I remove my A/C for the winter?
While removing your window A/C unit might seem like a hassle, it’s often the best option for protecting both your home and the unit itself during colder months. Removing your A/C unit for the winter offers several advantages:
- Prevents damage:by storing the unit indoors in a dry location, you protect it from freezing temperatures, moisture buildup, and corrosion;
- Improves energy efficiency: sealing the window after removing the unit eliminates drafts, helping you save on heating costs;
- Extends lifespan: proper storage minimizes wear and tear on components, ensuring your A/C lasts longer and performs better when reinstalled in summer.
When it’s safe to leave It installed?
In some cases, leaving your A/C installed might be acceptable:
- If you use a well-fitted weatherproof cover that prevents moisture from entering while allowing ventilation;
- If removing the unit poses safety risks due to its size or location (e.g., high windows);
However, even in these situations, regular inspections are necessary to ensure no moisture or debris accumulates inside the unit.
How to protect a window A/C during winter?
If removing your window A/C isn’t an option, there are steps you can take to minimize potential damage and maintain energy efficiency throughout the colder months.
Use a weatherproof cover
Invest in a cover specifically designed for window air conditioners.Choose one A/C made from breathable materials that allow moisture to escape while blocking snow and debris. Avoid plastic tarps as they can trap condensation inside the unit, leading to mold growth or corrosion. Make sure the cover fits snugly over the exterior portion of the A/C for maximum protection.
Seal gaps to prevent drafts
Use foam insulation strips or weatherstripping around the edges of the window frame where the A/C is installed. This helps reduce drafts and prevents warm air from escaping your home during winter. For added insulation, consider using plastic film over the entire window area.
Turn off and unplug the unit
Before winter begins, turn off your air conditioner completely and unplug it from its power source. This ensures that it won’t accidentally turn on during an unseasonably warm day, which could draw moisture into the system and increase the risk of damage.
Protect your investment with Florida Clean Air Plus!
Leaving a window A/C unit installed during winter comes with risks like moisture damage, drafts, and pest intrusion — but with proper precautions or by removing it entirely, you can avoid these problems while extending its lifespan.
If you need help removing your window A/C or preparing it for winter storage, Florida Clean Air Plus is here for you! Our expert technicians provide professional maintenance services to ensure your air conditioner stays in top condition year-round. Contact us today for assistance — your comfort is our priority!
