Did you know that air conditioning isn’t just for cooling in the high heat of summer? As winter sets in on the Central Coast, keeping your home warm and comfortable becomes a top priority. A split system air conditioner is one of the best ways to maintain a cosy indoor temperature during the cooler months, but to get the best performance and efficiency from your system, it’s important to follow some key maintenance and usage tips.
With over 50 years of experience, Central Coast Air Conditioning is your trusted partner in expert heating, ventilation and air conditioning solutions, ready to help you maximise your air conditioner’s performance this winter.
1) Regularly Change Your Filters
One of the most important steps in maintaining your split system air conditioner is regularly changing the filters. Dirty filters can reduce airflow, lower its efficiency, and circulate dust and allergens throughout your home.
Here are some steps to changing your filter:
- Turn off your air conditioner before performing any maintenance.
- Locate the filter—this is usually found behind the front panel of the indoor unit.
- Remove the filter carefully.
- Clean it with a vacuum or wash it with warm water and mild detergent (if it’s a washable filter).
- Make sure the filter is completely dry before reinserting it.
- Replace the filter if it is damaged or excessively dirty.
For a more detailed look at sorting your air condition filters, take a look at this article on how to change your air filter. At Central Coast Air, we recommend checking your filters at least once a month, especially during heavy usage periods, as well as cleaning or replacing them when needed.
2) Don’t Put Furniture in Front of Your Vents
To make sure your split system air conditioner is working efficiently, avoid placing furniture, curtains, or other obstacles in front of the indoor unit. Obstructions can restrict airflow, making it harder for warm air to circulate properly throughout your home. This can lead to uneven heating, increased energy consumption, and higher utility bills.
3) Keep Your System Well-Maintained
Regular maintenance is not just a key but the cornerstone to keeping your split system air conditioner running efficiently and extending its lifespan. At Central Coast Air Conditioning, we offer comprehensive servicing to make sure that your system operates at its peak performance.
Steps in a regular maintenance check:
- Inspection of all components – We check the indoor and outdoor units, electrical connections, and ductwork (if applicable).
- Cleaning of filters and coils – Dirty components reduce efficiency and increase energy costs.
- Testing refrigerant levels – Low refrigerant can make your system work harder, leading to higher bills.
- Checking for leaks or blockages – Ensuring proper drainage and airflow prevents costly repairs.
- Calibrating the thermostat – This helps maintain accurate temperature control and prevents overuse.
By scheduling regular maintenance, you can reduce wear and tear, improve efficiency, and avoid unexpected breakdowns during the colder months.
4) Use a Programmable Thermostat
A programmable thermostat allows you to set your air conditioner to turn on and off at specific times, helping you save on energy costs while ensuring your home stays comfortable. If you don’t have one, consider upgrading to a smart thermostat that allows you to control your split system remotely via Wi-Fi.
5) Insulate Your Home
Proper insulation can significantly improve your air conditioner’s efficiency by preventing heat loss. This helps maintain a steady indoor temperature without overworking your system.
Types of insulation to consider:
- Ceiling insulation: Helps trap warm air inside during winter.
- Wall insulation: Reduces heat transfer and keeps your home comfortable year-round.
- Floor insulation: Prevents heat from escaping through wooden or tiled floors.
- Draught-proofing: Use weather strips and door snakes to block cold air from entering.
- Curtains and blinds: Thick, thermal-backed curtains can help retain heat and reduce the need for excessive heating.
6) Don’t Set Your Thermostat Too Low
Setting your thermostat too low can cause unnecessary strain on your system and increase energy bills. For optimal comfort and efficiency, we recommend setting your split system to 18–20°C during winter.
7) Use a Humidifier
Winter air can be dry, which can make your home feel colder than it actually is. Using a humidifier is not just a solution but a game-changer that can help maintain a comfortable indoor environment by adding moisture to the air, which can also improve respiratory health and reduce static electricity.
8) Keep Your System Clean
Keeping both the indoor and outdoor components of your split system air conditioner clean is crucial for efficiency and longevity. By maintaining a clean system, you’re not only making sure of its optimal performance but also showing care for your investment, which can give you peace of mind during the winter months.
Tips for split system air conditioner cleaning:
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Cleaning your indoor unit:
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- Dust the vents and air intake regularly.
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- Clean the filters as outlined in section 1.
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- Wipe the exterior casing with a damp cloth to remove dust buildup.
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Cleaning your outdoor unit:
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- Clear away any leaves, dirt, and debris from around the unit.
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- Make sure there’s at least 30 cm of space around the outdoor unit for proper airflow.
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- Hose down the coils gently to remove dirt and grime, but avoid using high-pressure water.
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- Check that there are no obstructions (plants, furniture, or fencing) blocking airflow.
9) Be Mindful of Your Air Conditioner Usage
Running your air conditioner non-stop can actually lead to higher energy costs, meaning higher bills and increased wear and tear. Try to use your system efficiently by:
- Turning it off when not needed.
- Using timers to automate operation.
- Keeping doors and windows closed while the unit is running.
- Dressing warmly so you don’t rely solely on heating.
10) Get Professional Air Conditioner Servicing
If your split system air conditioner isn’t performing as well as it should, it’s not just a sign but a clear indication that it might be time for a professional check-up. At Central Coast Air Conditioning, we offer same-day callouts, expert diagnostics, and repairs, as well as air conditioner cleaning to keep your system running smoothly all winter long.
Get in Touch with Central Coast Air Conditioning Today
Winter on the Central Coast can bring chilly mornings and cool nights, making a reliable heating solution essential. At Central Coast Air Conditioning, we’ve been serving the region for over 50 years, offering expert installation, maintenance, and diagnostics & repair services for split system air conditioners and ducted systems.
Our fully qualified technicians provide thorough diagnostic testing and detailed repair quotes to ensure you get the best performance from your system. Whether you need routine servicing or a complete installation, we’re here to help.
Call us today on 02 4365 2677 or book a free quote online to keep your home warm and comfortable this winter!




