As the cold winter months approach, most homeowners shift their focus away from their air conditioning units, assuming that the system will not be needed again until summer. However, winter can be a great time to care for your air conditioner and ensure that it’s ready to perform at its best when the temperatures rise again. Regular maintenance can extend the life of your unit, reduce the likelihood of costly repairs, and improve its efficiency when it’s time to use it again. In this article, we’ll walk you through the steps you can take to maintain your air conditioning unit during the winter.

1. Turn Off the Power

Before performing any maintenance, the first step is to make sure the power to your air conditioning unit is completely off. This will not only prevent electrical accidents but also protect the unit’s internal components from any potential damage. Locate the power switch for your air conditioner, usually near the unit or inside the house at the thermostat, and turn it off. Additionally, if your unit is connected to a circuit breaker, turn that off as well.

2. Clean or Replace the Air Filter

The air filter in your air conditioning unit plays a critical role in keeping the system clean and efficient by trapping dust, dirt, and allergens from the air. Over time, these particles can build up, clogging the filter and reducing airflow, which makes your unit work harder to cool your home.

Winter is a good time to inspect your air filter and either clean it or replace it, depending on the type of filter you have. If the filter is reusable, you can clean it by gently vacuuming off the dust or rinsing it with water (make sure it’s completely dry before re-inserting it). If it’s a disposable filter, it’s best to replace it entirely.

3. Clean the Coils

The evaporator and condenser coils in your air conditioning unit collect dirt over time, which can reduce the system’s ability to absorb and expel heat. While these coils don’t need as much attention during winter, it’s still a good idea to check them and clean them if necessary.

• Evaporator coils are located inside the unit and often require a professional to clean them properly. However, you can inspect them for visible dirt or damage.
• Condenser coils are located outside, and these tend to collect debris such as leaves, dirt, and twigs. Cleaning these coils is a relatively simple task that you can perform yourself. Use a garden hose to gently rinse off any dirt and leaves from the outside unit. Avoid using a high-pressure spray, as this can damage the coils.

If you notice any significant dirt buildup or mold growth on the coils, it might be time to call in a professional for a more thorough cleaning.

4. Inspect the Ductwork

Over time, the ducts in your home can develop leaks or become blocked with dust and debris. Leaky ducts reduce the efficiency of your air conditioning unit, as cooled air escapes before it reaches the desired areas of your home. Inspect the visible ducts for any signs of wear or damage, paying close attention to joints, seams, and corners. You can seal any small gaps with duct tape or mastic sealant.

If you haven’t had your ducts cleaned in a while, this is a great time to do so. Professional duct cleaning services, such as those offered by Bukit Panjang aircon servicing, can remove dust, debris, and even mold that may have accumulated over time. This not only improves indoor air quality but also enhances your system’s efficiency when you start using it again.

5. Cover the Outdoor Unit

While your air conditioning unit won’t be used in the winter, it’s important to protect the outdoor unit from the harsh weather elements. Snow, ice, and debris can damage the condenser coils or clog the system, leading to expensive repairs when it’s time to use the AC again. To keep your outdoor unit safe, consider covering it with a weatherproof cover.

When selecting a cover, make sure it is designed for air conditioning units. The cover should be breathable to prevent moisture from getting trapped inside, as this could lead to mold and corrosion. Don’t make the mistake of covering your unit too tightly—adequate ventilation is essential for preventing moisture buildup.

Alternatively, you may choose to leave the unit uncovered. Some experts suggest that allowing it to breathe naturally is better for preventing condensation inside the unit. If you do decide to leave it uncovered, simply ensure that it is free from debris, such as leaves or branches, that could damage the system.

6. Check the Refrigerant Levels

Though refrigerant levels are typically not a concern during winter, it’s still a good idea to check them at least once a year, usually before you start using your unit again. Low refrigerant levels may indicate a leak, which can prevent the air conditioner from cooling effectively and cause the compressor to work harder, leading to potential damage over time.

If you suspect that the refrigerant levels are low or if you see any signs of a refrigerant leak (e.g., ice buildup around the refrigerant lines), contact a professional HVAC technician to inspect and repair the system. They can check the refrigerant charge, repair any leaks, and recharge the refrigerant as necessary.

7. Keep the Area Around the Unit Clear

Both the indoor and outdoor units need to have sufficient airflow to function efficiently. During winter, it’s easy to overlook this important detail and let plants, furniture, or storage accumulate around your system. Be sure to clear away any obstructions around the outdoor unit, such as fallen leaves, debris, or snow. These obstructions can restrict airflow, forcing the system to work harder when it’s time to turn it back on.

If you store items near the indoor unit, keep them at least a few feet away from the vents and air handler. This will allow for better air circulation when you start the system up again.

8. Schedule an Annual Professional Inspection

Even if you perform all the basic maintenance tasks yourself, it’s always wise to schedule a professional inspection and tune-up for your air conditioning system every year. An HVAC technician can thoroughly inspect your unit for any underlying issues, check the refrigerant levels, clean the coils and drain lines, and ensure that everything is running smoothly. Having a professional technician service your unit during the off-season can help catch any potential problems before they become major issues.

Conclusion

Winter may seem like the least important time to care for your air conditioning unit, but proper off-season maintenance is essential for ensuring that your system is ready to perform when you need it most. By following these steps—cleaning or replacing the air filter, cleaning the coils, inspecting the ductwork, covering the outdoor unit, checking refrigerant levels, keeping the area around the unit clear, and scheduling a professional inspection—you can extend the lifespan of your air conditioner, improve its efficiency, and avoid costly repairs. With just a little care and attention, your air conditioning unit will be in excellent shape for the summer months ahead.