How to Save Energy This Summer – Air Conditioning Tips for Summer

Summer air conditioning can make a big difference to comfort, but the right air conditioning tips for summer can also help manage energy use. At Ready Electrical & Air Conditioning, we recommend focusing on the right temperature, airflow, shading and regular servicing to stay cool while avoiding unnecessary strain on your air conditioning system. 

What Are the Best Air Conditioning Tips for Summer?

The most useful air conditioning tips are simple: choose a sensible temperature, cool the rooms you are using, keep heat out, maintain good airflow and address faults before they become bigger problems.

For many Australian homes, air conditioning is one of the main ways to manage summer heat. Australian Government guidance recommends setting cooling between 25°C and 27°C, depending on your comfort and home conditions. It also notes that each degree of additional cooling can increase energy use by around 5% to 10%.

That does not mean you need to sit uncomfortably in a warm room. It means you can start with a reasonable setting and adjust it to suit your household rather than automatically turning the thermostat as low as possible.

1. Set Your Air Conditioner to a Comfortable Temperature

One of the easiest mistakes to make on a hot day is setting the thermostat much lower than necessary. If your home feels very hot, you might be tempted to select 18°C because you want immediate relief. However, choosing a very low temperature does not necessarily make your air conditioner cool the room faster.

A better approach is to choose a sensible summer setting and give the system time to work. For many households, 25°C to 27°C is a practical starting range. Your ideal setting can vary depending on the room, humidity, insulation, sunlight and personal comfort.

What About Extremely Hot Sydney Days?

On very hot days, particularly during prolonged periods of heat, your air conditioner may need to run for longer to maintain a desired indoor temperature. Rather than repeatedly changing the thermostat, look at the whole room:

• Are curtains or blinds blocking direct sunlight?
• Are doors and windows closed while cooling?
• Is the indoor unit receiving good airflow?
• Is the filter clean?
• Are you cooling rooms that nobody is using?
• Is the outdoor unit clear of obstructions?

These factors can affect how hard your system has to work.

2. Keep Heat Out Before Your Air Conditioner Has to Remove It 

Your air conditioner can only do so much if your home is constantly gaining heat. Windows exposed to direct afternoon sun can allow considerable heat into a room. Closing curtains, blinds or shutters before the hottest part of the day can reduce the amount of heat your air conditioner has to deal with.

You can also consider:

• Closing doors between conditioned and unconditioned areas
• Shading sun-facing windows
• Checking obvious gaps around doors and windows
• Using external shading where appropriate
• Opening windows when outdoor conditions are suitable and cooling the home naturally

The aim is simple: reduce the heat entering your home so your air conditioner has less work to do. This can be particularly useful in Sydney homes where rooms with strong afternoon sun can become noticeably warmer than shaded areas.

3. Cool the Rooms You Actually Use

If you have a split-system air conditioner, you do not necessarily need to cool the whole house. For example, if your family spends most of the afternoon in the living area, focus cooling there rather than trying to make unused bedrooms equally cold.

With ducted systems, zoning can provide greater control over which areas receive conditioned air. This can be particularly useful for larger homes, families with different schedules, or properties where some rooms are rarely occupied.

When considering a new ducted installation, our team can discuss zoning and system design based on how you actually use your home, rather than simply choosing a system based on floor area.

4. Use Ceiling Fans Alongside Air Conditioning

A ceiling fan and air conditioner can work well together. A fan does not cool the room in the same way an air conditioner does. Instead, it moves air across your skin, which can make you feel cooler and improve air circulation.

This means you may feel cooler at a slightly higher air conditioning temperature when a fan is also circulating air. Fans can be especially useful in: 

• Bedrooms
• Living areas
• Open-plan spaces
• Rooms that receive some cooled air from another area

Turn the fan off when the room is unoccupied. Unlike air conditioning, a fan’s main benefit is felt by people in the room rather than by the room itself.

We also provide ceiling fan installation as part of our broader electrical services, which can be useful when improving airflow and comfort throughout your home.

5. Use Timers and Sleep Functions Wisely

Many modern air conditioners have timers, sleep functions and programmable controls. These features can help you match cooling to your routine instead of leaving the system operating when nobody needs it.

For example, you could:

• Set a timer for overnight operation
• Use sleep mode while you are in bed
• Schedule cooling around your normal arrival time
• Avoid running the system unnecessarily when the house is empty

If your air conditioner has Wi-Fi controls, check the manufacturer’s instructions to see which scheduling functions are available. The right settings will depend on your system, your home and your daily routine.

How Does Air Conditioner Maintenance Affect Energy Use?

Even good operating habits cannot compensate for an air conditioner that is poorly maintained or developing a fault.

A system with restricted airflow or dirty components may struggle to deliver the cooling you expect. You may notice that it runs for longer, rooms take more time to cool, or airflow is weaker than it used to be.

Keep the Air Filter Clean

Air filters collect dust and other particles as air passes through the indoor unit. When a filter becomes heavily restricted, airflow can be affected. Check the manufacturer’s instructions for how and when the filter should be cleaned.

Filter cleaning is a useful homeowner maintenance task, but it is not the same as professional air conditioning service and maintenance, which can include checking the system’s overall operation, airflow, electrical connections and other components.

Keep the Outdoor Unit Clear

The outdoor unit needs suitable airflow around it. Keep the surrounding area free from obvious obstructions, stored items and excessive vegetation. Do not dismantle the unit or attempt electrical work yourself.

If you notice damage, unusual sounds or a significant change in performance, arrange a professional inspection.

Book Servicing Before You Need It

Preventative maintenance is easier to plan before the peak of summer than after your air conditioner stops working on a hot afternoon. During a professional service, our qualified team can inspect the system and identify issues that may not be obvious to you.

We service different air conditioning system types, including split systems, ducted systems and multi-head systems. Our service can include checking and cleaning components, inspecting electrical connections, testing system operation and checking drainage. That gives you a better understanding of the system’s condition before you rely on it heavily throughout summer.

How Can You Prepare Your Air Conditioner for Summer?

A pre-summer check is worthwhile if your system has been sitting unused or has not been serviced for some time.

Use This Simple Summer Checklist:

1. Clean the air filter according to the manufacturer’s instructions.
2. Check that air is flowing normally from the indoor unit.
3. Make sure the outdoor unit is not obstructed.
4. Test the system before the first major heatwave.
5. Check for unusual smells or noises.
6. Look for signs of water leakage.
7. Check your thermostat and remote control.
8. Make sure curtains and blinds can be used to reduce direct sunlight.
9. Arrange professional servicing if performance has changed or maintenance is due.

Testing your system early gives you time to arrange an inspection if something is not right.

What If Your Air Conditioner Is Not Cooling Properly?

Not every cooling problem is caused by the thermostat. If your system is running but the home is not cooling as expected, several issues could be involved. These can include restricted airflow, dirty components, drainage problems, electrical faults, refrigerant-related issues or an installation that is no longer suitable for the property.

Watch for These Warning Signs:

• Weak airflow
• Air that does not feel as cool as usual
• The system running for unusually long periods
• Water leaking from the indoor unit
• Ice forming on the indoor unit or other components 
• Persistent unusual smells
• Strange noises
• A room that consistently fails to reach your desired temperature 

You can check straightforward items such as your thermostat setting and filter, following the manufacturer’s instructions.

However, electrical components, refrigerant systems and internal faults should be assessed by appropriately licensed professionals. Do not attempt to open the system, alter electrical wiring or handle refrigerant yourself.

When Should You Repair or Replace Your Air Conditioner?

A common question is whether an underperforming air conditioner should be repaired or replaced. There is no single answer.

Repair may be appropriate when the system has a manageable fault and remains suitable for the property. Air conditioning repairs can be a practical option when fixing the fault is likely to restore reliable performance without requiring a full replacement. Replacement may make more sense when an older system has repeated faults, no longer meets the home’s cooling needs, or would require substantial repair. The condition of the system is only part of the decision. 

You should also consider:

• The age and history of the system
• Frequency of previous repairs
• Cooling capacity
• Energy performance
• Changes to the property
• Whether you are renovating or extending
• The cost and scope of the proposed repair
• Whether a different system type would better suit the home

At Ready Electrical & Air Conditioning, we can assess your existing system and explain the available options rather than assuming replacement is always the answer.

Could Your Air Conditioner Be the Wrong Size?

If an air conditioner is consistently struggling to cool the space, the problem is not necessarily a fault. System sizing matters.

An undersized system may struggle to maintain the desired indoor temperature during very hot weather. An oversized system is not automatically better either, because the appropriate choice depends on the property, layout, insulation, windows, orientation and how the rooms are used. 

This is one reason professional assessment matters when installing or replacing an air conditioner. For a new installation, our team can consider your property’s requirements and discuss options such as:

• Split systems
• Multi-head systems
• Ducted air conditioning
• Bulkhead systems
• Commercial air conditioning

The right choice depends on your home, budget, comfort requirements and how you want the system to operate.

Air Conditioning Tips for Summer in Northern Beaches Homes 

We are a family-owned electrical and air conditioning business based in Sydney’s Northern Beaches. 

That local experience matters because no two homes have exactly the same cooling requirements. A coastal home, an older property with limited insulation, a renovated house with an open-plan extension and a newer home with modern glazing can all behave differently in summer.

Your home’s:

• Orientation
• Window exposure
• Insulation
• Room layout
• Ceiling height
• Occupancy
• Existing electrical capacity
• Air conditioning system

can all affect cooling requirements. For homeowners in the Northern Beaches and surrounding areas, the practical question is not simply “What is the cheapest way to run an air conditioner?”

It is:

“What setup and operating habits make sense for this home and the way you live in it?”

That is the question worth discussing when an existing system is struggling or when you are planning a new installation.

A Practical Summer AC Routine

If you want a simple routine to follow, start here.

Before Summer

• Clean filters
• Test the system
• Check airflow
• Clear the outdoor unit area
• Arrange servicing if required

During Hot Weather

• Use a sensible thermostat setting
• Close curtains or blinds during strong sunlight
• Keep doors and windows closed while cooling where appropriate
• Use fans to improve comfort
• Cool occupied areas rather than empty rooms
• Use timers or sleep settings

If Performance Changes

• Check the thermostat
• Check the filter
• Look for obvious airflow problems
• Stop if there is a safety concern
• Arrange a professional inspection if the issue persists

This approach helps you separate normal summer operation from signs that your air conditioner needs attention.

FAQs About Air Conditioning Tips for Summer

What Temperature Should I Set My Air Conditioner to in Summer?

Australian Government guidance recommends a summer cooling setting of around 25°C to 27°C, although your ideal temperature depends on your home and personal comfort. Setting the thermostat much lower does not necessarily cool the room faster.

Is It Cheaper to Leave the Air Conditioner on All Day?

Not necessarily. Energy use depends on the system, temperature setting, weather, home conditions and how long cooling is required. Timers and scheduling can help match operation to when you actually need cooling.

How Can I Make My Air Conditioner More Energy Efficient?

Start with sensible temperature settings, clean filters, good airflow, shading, appropriate use of fans and cooling only occupied areas. If your system is struggling despite these measures, professional servicing can help identify possible faults.

How Often Should I Service My Air Conditioner?

The appropriate interval depends on the system, usage and manufacturer’s recommendations. If your air conditioner is used heavily, performance has changed, or servicing is overdue, arranging an inspection before summer is sensible.

Why Is My Air Conditioner Running Constantly in Summer?

Very hot weather can naturally make an air conditioner run for longer. However, constant operation combined with poor cooling, weak airflow or other changes in performance can indicate a problem that needs professional assessment.

Should I Repair or Replace My Old Air Conditioner?

It depends on the system’s age, condition, repair history, performance and suitability for your home. A professional assessment can help you compare repairing the existing unit with installing a replacement system.

Stay Cool This Summer With the Right Air Conditioning Advice

Good air conditioning tips are about more than turning the thermostat down. Start by keeping heat out of your home, using a sensible temperature, maintaining airflow and cooling the areas you actually use. Keep filters clean, test your system before the hottest weather arrives and arrange professional servicing when maintenance is due. 

If your air conditioner is no longer cooling properly, repeatedly breaking down or no longer suits your home, it may be time to discuss repair or replacement options.

We are a family-owned Sydney business based on the Northern Beaches, providing air conditioning installation, repairs, servicing and maintenance, along with supporting electrical services.

Whether you need help with an existing system or are planning air conditioning for a new home, renovation or extension, our team can explain the options clearly and help you choose a practical solution for your property.

Ready to prepare your AC for summer? Request a quote, book an appointment or contact our Ready Electrical & Air Conditioning team to discuss your needs.