What Happens If An Air Conditioner Stays Unused For Months?

When it comes to HVAC systems, many devices can experience issues if they sit unused for an extended period—think vehicles or lawnmowers gathering dust in the garage. But what about your air conditioning unit? Is there cause for concern if your air conditioner remains idle for three to four months or more?

Fortunately, the outlook is generally positive! If you have a properly installed air conditioning system that receives regular maintenance, it should function effectively throughout the summer. However, it’s wise to perform preventative measures and maintenance checks before powering up your HVAC system. Taking these steps ensures your heating system and air conditioning unit are ready to deliver optimal performance when you need them most.

Air Conditioners Usually Stay Fine After Months of Not in Use

In general, today’s robust air conditioning systems are designed for longevity. Many units are built to operate daily for extended periods and can last for decades. As long as your HVAC system is in good working order and receives the necessary maintenance, it’s unlikely to encounter issues after being turned off for a few months. Regular upkeep ensures that your air conditioning and heating systems remain reliable, providing comfort whenever you need them.

In fact, since most people don’t require air conditioning year-round, this downtime is a normal aspect of typical AC operation. Even in hotter states like Nevada and Arizona, there are months when air conditioning isn’t needed, and many areas experience even longer winters.

However, there are essential considerations to keep in mind when shutting down your HVAC system for the season or when starting it up for the first time after three to four months. Ensuring proper preparation and maintenance will help your air conditioning unit operate efficiently and effectively when you need it most.

Essential Precautions Before Starting Your Air Conditioner After It’s Been Unused

One of the primary issues that can affect an unused air conditioning system is the buildup of dust inside the unit or the accumulation of debris outside. If you’re preparing to turn on your HVAC system after a few months of inactivity, here are some essential steps to take first:

• Start by heading outside to inspect your compressor unit. Check for any weeds growing on or around it, debris accumulation, or potential blockages. Remove any debris before proceeding. It’s important not to open the unit yourself; if you suspect internal issues, consider contacting a professional HVAC technician.
• Are you staying on top of maintenance? Air conditioning systems should be serviced by a professional at least once a year, and twice a year in extreme climates like Nevada or Arizona. If you didn’t schedule maintenance last season, be sure to arrange for it before powering up your air conditioning unit.
• Start by running your air conditioning unit in fan mode. Before switching to cool, set your thermostat to fan mode and let it run for at least 10 minutes. Dust buildup can hinder your HVAC system’s performance.
• Be sure to clean or replace your air filters. If you have an indoor unit, check your filters and either clean and dry them or replace them entirely. Dirty filters can lead to significant issues with your air conditioning system, potentially causing your fan or compressor to fail prematurely. Keeping your filters clean is essential for optimal airflow and system efficiency.
• Check for refrigerant leaks, as they can significantly affect your air conditioning system’s performance. It’s crucial to address any refrigerant leaks promptly to maintain the efficiency of your HVAC system and ensure optimal cooling. If you suspect a leak, consider contacting a professional technician for repairs.

How to Get Your Air Conditioner Ready for the Off-Season

Taking simple steps at the end of the season can help prepare your HVAC system for the next season. If you’re turning off your air conditioning unit, dedicate a weekend to perform these tasks:

• Switch off your air conditioning unit. Find the power switch, typically located near the condensing unit. Lift the protective safety cover and toggle the switch from “on” to “off,” then close the cover. Taking this precaution ensures your system remains dormant until you need it again.
• Clear out the system by running your AC fan independently for up to an hour. This helps to ventilate and clean the unit effectively.
• Take this opportunity to perform essential maintenance checks as well. Inspect the exterior of your air conditioning unit for signs of wear. Look for rust, leaks, cracks, or other issues. If you identify any problems that require professional attention, don’t hesitate to reach out to our HVAC experts for assistance. Keeping your system in top shape is crucial for its longevity and efficiency.
• Clean your air conditioning unit thoroughly, as it accumulates dust, dead insects, bird droppings, and debris over the summer.
• To protect your air conditioner from the elements, consider using a cover for your condenser unit. Waterproof AC covers are readily available at most home improvement stores. Secure the cover with bungee cords, ensuring it’s tight enough to withstand wind but loose enough to prevent moisture buildup.

These steps usually prepare your AC for three to four months of inactivity. However, if repairs are needed, fix them first. This ensures your AC works efficiently when needed again. Regular maintenance and timely repairs will help extend the lifespan of your air conditioning system and maintain optimal performance.

Will Existing AC Problems Worsen After 3-4 Months of Inactivity?

Air Conditioner performance doesn’t improve after being left unused. According to the U.S. Department of Energy, inadequate maintenance is a common issue affecting AC units, along with poor service procedures and faulty installation. If you experienced significant problems with your air conditioning system before shutting it down, those issues may have worsened during the downtime. For instance:

• If there was a refrigerant leak before, your air conditioning unit could have gone from low to completely empty after three months of inactivity. This can severely impact its performance and efficiency, making it essential to address any leaks before turning the unit back on.
• Performance issues stemming from dirty coils or corroded wire terminals are likely to deteriorate over time. If these problems are left unaddressed, they can lead to reduced efficiency and increased energy costs, ultimately affecting the overall functionality of your HVAC system. Regular maintenance is key to preventing these issues from escalating and avoid AC repairs.
• If your air conditioning unit turns on but struggles to perform—such as blowing warm air or shutting off too frequently—it could indicate a sensor issue or a duct leak. These problems are likely to be more pronounced after a period of inactivity and may require immediate attention from a professional to restore optimal performance and efficiency to your HVAC system.

If you’re encountering any of these issues, the best course of action is to schedule professional AC servicing during the off-season, before you turn it back on in the spring. This proactive approach can help prevent sudden air conditioning failures, which can be inconvenient and may end up costing more than addressing the initial problem. Ensuring your HVAC system is in top shape now will provide peace of mind when warmer weather arrives.

Conclusion

If your air conditioner has been unused for a few months, it’s typically fine to use again, provided it was well-maintained. To ensure optimal performance, clean or replace filters, check for debris around the outdoor unit, and run the system in fan mode first. Before shutting it down for the off-season, turn off the power, clean the unit, and cover it to protect from weather damage. If your AC had issues before, get them addressed promptly, as problems like refrigerant leaks or dirty coils can worsen during inactivity. Regular maintenance will keep your system running efficiently for years.

FAQs

How Can I Tell If My Air Conditioner Needs Repairs Before the Season Starts?

Look for signs such as unusual noises, inconsistent cooling, or higher energy bills. If your AC shows any of these symptoms, it’s best to have it inspected by a professional before using it again.

What Are the Benefits of Regular Air Conditioner Maintenance? 

Regular maintenance helps improve energy efficiency, extends the lifespan of your unit, and prevents unexpected breakdowns. A well-maintained system operates better, saving you money on energy costs.

Can I Use My Air Conditioner During the Winter Months? 

While it’s not recommended to run your air conditioner in cold temperatures, some units have a heat pump function. However, ensure your unit is designed for such use to avoid damage.

What Should I Do If I Find Mold or Mildew in My AC Unit? 

If you discover mold or mildew, it’s crucial to address it immediately. Cleaning the unit and replacing filters is essential, but you may also need to consult a professional for thorough cleaning and remediation.

Is It Safe to Cover My AC Unit for the Off-Season? 

Yes, covering your unit is advisable to protect it from debris and harsh weather. However, ensure that the cover allows for airflow to prevent moisture buildup, which can lead to mold and damage.