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Published on 26 Aug 2025

Air conditioning units are essential in maintaining comfort, especially during Sydney’s hot summer months. Ensuring your air conditioner unit is running smoothly and efficiently requires regular attention. Proper air conditioning maintenance can not only extend the life of your system but also improve energy efficiency, reduce repair costs, and enhance indoor air quality. These easy-to-follow tips on air conditioner maintenance will ensure your unit lasts as long as possible while keeping your home or business cool and comfortable.

1. Regular Filter Checks and Replacements

The air filter in your air conditioning system is one of the most crucial components for maintaining good air quality and the overall health of your AC. When filters become clogged with dust, dirt, and debris, the airflow is restricted, causing the system to work harder. This leads to increased energy consumption, strain on the compressor, and potential breakdowns.

To maintain optimal air conditioner service, check and clean or replace the filters at least once every 1-3 months, depending on the model and usage. If you have pets or live in a dusty area, more frequent cleaning or replacement is recommended.

2. Clean the Coils

Over time, the evaporator and condenser coils of your air conditioner collect dirt, which reduces the system’s ability to cool. A dirty evaporator coil can lead to reduced airflow and eventually freezing up, while a dirty condenser coil reduces the unit’s ability to expel heat, resulting in inefficient cooling.

To prevent this, schedule regular aircon maintenance to clean the coils annually. You can clean the evaporator coil by turning off the power and using a soft brush or a coil cleaner to gently remove the dirt. The condenser coil should also be cleaned periodically, ensuring that it is free from any obstructions like leaves or debris. In some cases, professionals may need to perform air conditioning maintenance to clean the coils thoroughly.

3. Ensure the Refrigerant Level is Correct

Your air conditioning unit uses refrigerant to cool the air. If the refrigerant level is too low, the system will struggle to cool effectively, causing the compressor to overheat and potentially fail. If you notice that your AC is not cooling as well as it should or is blowing warm air, there may be a refrigerant leak that needs to be addressed.

Having your air conditioner maintenance schedule include refrigerant checks can prevent major issues. A licensed technician can check the refrigerant levels and top them up if necessary, ensuring your system operates at peak efficiency.

4. Keep the Condenser Unit Clean

The outdoor condenser unit plays a critical role in the air conditioning system, releasing the heat absorbed from inside your home. Over time, dirt, leaves, and other debris can accumulate around the condenser, blocking airflow and reducing the efficiency of the AC.

Make sure to regularly clear any obstructions around the condenser. A minimum of two feet of clear space around the unit is recommended for proper airflow. If your air conditioning service involves a professional technician, they will check the condenser and clear any blockages during their visit.

5. Inspect Ductwork for Leaks

Leaky ducts can significantly reduce the efficiency of your air conditioning system. If your air ducts have holes or gaps, cool air will escape, and your AC will have to work harder to maintain the desired temperature. This can lead to higher energy bills and more wear on the system.

Regular inspection of your ductwork as part of your AC maintenance routine will help identify and fix leaks early. A professional maintenance service can perform a thorough inspection of your system, seal any leaks, and improve airflow, resulting in better cooling efficiency and lower energy costs.

6. Lubricate Moving Parts

Many of the parts in your air conditioning unit have moving components, such as the fan and the motor. Over time, these parts can become worn out or damaged, leading to reduced performance or even failure.

As part of your regular aircon maintenance, make sure to lubricate moving parts to reduce friction and prevent premature wear. Technicians often perform this during AC service appointments, ensuring your system runs smoothly.

7. Monitor the Thermostat

Your air conditioner’s thermostat controls the temperature of your home. If it’s not calibrated correctly, your system may overcool or undercool, leading to discomfort and increased energy use. Incorrect thermostat readings can also signal deeper issues with your system’s performance.

Ensure that your thermostat is properly calibrated and located away from heat sources, such as sunlight or appliances. For air conditioning maintenance, you can also upgrade to a smart thermostat, which offers more precise control over your system, improving energy efficiency and convenience.

8. Schedule Annual Professional Inspections

While regular DIY maintenance can help improve your air conditioner’s performance, nothing beats a professional air conditioner maintenance inspection. A certified technician can conduct a thorough evaluation, clean all necessary parts, and identify potential issues before they become major problems. Scheduling annual air conditioning service will give you peace of mind, knowing that your unit is in top condition and operating efficiently.

9. Check the Insulation

Proper insulation is essential for your air conditioner to maintain a consistent temperature. If your system’s insulation is damaged or worn out, cool air will escape, causing your unit to work harder than necessary. This can result in increased energy bills and unnecessary wear on the system.

Check insulation around your ducts and refrigerant lines. If the insulation is damaged or inadequate, it may be time to replace it. As part of your AC maintenance, a technician can help assess the insulation and recommend improvements.

10. Watch for Warning Signs

Being proactive about your air conditioner’s maintenance can prevent unexpected breakdowns. However, it’s also important to watch for signs that your AC may need immediate attention. If you notice any of the following, contact a professional technician for an inspection:

  • Strange noises: Banging, rattling, or squealing sounds could indicate a mechanical problem.
  • Uneven cooling: If some rooms are cooler than others, it may signal an issue with airflow or ductwork.
  • Frequent cycling: If your AC turns on and off frequently, it could be a sign of an issue with the thermostat or electrical components.
  • High humidity: If the air in your home feels humid even when the AC is running, there may be a problem with the refrigerant levels or the unit’s ability to expel moisture.

Wrapping Up

Regular air conditioning maintenance is crucial for prolonging the lifespan of your system and ensuring it operates efficiently throughout the year. By taking simple steps like checking filters, cleaning coils, and scheduling professional inspections, you can keep your AC running smoothly for years to come. In addition to improving comfort and air quality, proper maintenance helps reduce repair costs and energy consumption, saving you money in the long run.

At Skycon Air, we are dedicated to providing high-quality air conditioning service for ducted air conditioning system and split system to keep your system in optimal condition. Contact us today at 1300 264 424 or visit our booking page to schedule a service or get expert advice on how to maintain your air conditioner effectively. Stay cool and comfortable, no matter the season.

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