The days are beginning to warm up across South East Queensland, and air conditioners that have spent much of winter sitting idle are starting to come back into regular use.
This is often when the first problems appear.
A system that seemed fine at the end of last summer may now take longer to cool the room, make unfamiliar noises, trip a circuit or fail to start altogether. The first warm days provide an opportunity to find these problems before sustained summer heat arrives and air-conditioning technicians become considerably busier.
The first warm day is a useful test
Many households do not think about their air conditioning until the temperature becomes uncomfortable.
By that point, the system may be expected to run for hours at a time while local installers are responding to the same sudden increase in demand from hundreds of other households.
Testing the air conditioner now gives you time to see how it performs without the pressure of an extreme summer day.
Set the system to cooling mode, allow it to operate for a reasonable period and pay attention to whether it cools the room consistently. Check that air is flowing properly from the indoor unit and that the outdoor unit has enough clear space around it.
Signs your air conditioner may need attention
An air conditioner does not always stop completely when something is wrong. It may continue operating while using more electricity, cooling less effectively or placing additional strain on its components.
Warning signs can include:
- The system does not start reliably
- The circuit breaker or safety switch trips when it operates
- The room takes much longer to cool than it previously did
- Airflow from the indoor unit is weak or inconsistent
- The system switches itself off unexpectedly
- There are unusual noises or vibrations
- Water is leaking from the indoor unit
- There is a burning or electrical smell
- The system runs continuously without reaching the selected temperature
A dirty filter can reduce airflow and affect performance, but repeated tripping, electrical smells and unreliable operation should not be ignored. Stop using the system and arrange an assessment if there are signs of an electrical fault.
Clean the filters before peak use
Cleaning the filters is one of the simplest things a homeowner can do to help an air conditioner operate effectively.
Dust restricts airflow through the indoor unit. This can make the system work harder to cool the room and reduce the amount of conditioned air being delivered.
The Australian Government recommends keeping indoor units free from dust, wiping down accessible vents and louvres, and arranging a regular service inspection before periods of peak use.
Always follow the manufacturer’s cleaning instructions. Homeowners should not remove electrical covers or attempt repairs inside either unit.
Is the system still suitable for the room?
Sometimes poor cooling is not caused by a new fault. The system may simply no longer suit the way the space is being used.
A room can place more demand on an air conditioner after renovations, changes to windows, additional occupants or the introduction of heat-producing appliances and electronic equipment.
An undersized air conditioner may run continuously without cooling the room properly. An oversized system can cool the space too quickly without managing humidity as effectively, while repeatedly switching on and off.
Choosing a replacement should therefore involve more than matching the capacity written on the old unit. Room size, ceiling height, insulation, window area, orientation and exposure to afternoon sun can all influence the required capacity.
The electrical system also needs to support the air conditioner
A new split-system air conditioner adds another significant appliance to the home’s electrical system.
Before installation, the electrician may need to assess the condition of the switchboard, existing circuit protection, available electrical capacity and the proposed cable route between the indoor unit, outdoor unit and switchboard.
This becomes particularly important in homes running multiple air conditioners alongside electric cooking, hot water systems, pool equipment and other high-demand appliances.
An older switchboard does not automatically need to be replaced because an air conditioner is being installed. However, any limitations should be identified before the system is selected and installation begins.
How you operate the system affects the bill
Air conditioning can represent a significant part of household electricity consumption during a Queensland summer.
Energex recommends setting air conditioners to 25°C during summer. It estimates that every degree cooler can add around 10% to the electricity used by the system.
That does not mean every home will experience the same result. Running costs also depend on the size and efficiency of the system, the condition of the home, outdoor temperatures and how long the air conditioner operates.
Simple measures can help the system work more effectively:
- Close doors to rooms that are not being cooled
- Use blinds or curtains to reduce direct sunlight
- Keep filters and accessible vents clean
- Keep the outdoor unit clear of vegetation and stored items
- Use ceiling fans to circulate cooled air
- Avoid selecting an unnecessarily low temperature
- Cool the room before the hottest part of the day where practical
Running a ceiling fan with the air conditioner can make the room feel more comfortable while allowing the air conditioner to operate at a higher temperature setting.
Repair the old system or install a new one?
Not every poorly performing air conditioner needs to be replaced.
The right decision depends on the nature of the problem, the age and condition of the system, repair costs, energy efficiency and whether the unit still suits the room.
A relatively recent system with a straightforward fault may be worth repairing. An older system that breaks down repeatedly, struggles to cool the room or uses considerably more electricity than a modern replacement may no longer be economical to keep.
An assessment can help determine whether the problem is electrical, related to the air-conditioning equipment or caused by the system being unsuitable for the space.
Why organise it before summer?
The best time to discover an air-conditioning problem is before you urgently need the system.
Acting during the early warm weather gives you more time to compare options, select an appropriately sized system and arrange any electrical work required for the installation.
Waiting for the first prolonged heatwave can mean dealing with reduced appointment availability at the same time as your home becomes increasingly uncomfortable.
Get your home ready for the warmer months
Power Bolt Electrical provides split-system air-conditioning installations and electrical support for cooling upgrades across North Brisbane and Moreton Bay.
If your current air conditioner is struggling or you are considering installing a new system, now is a good time to organise an assessment before the summer rush begins.
Contact Power Bolt Electrical to discuss your air-conditioning installation or electrical requirements.
Frequently Asked Questions
When should I test my air conditioner before summer?
Test your air conditioner during the first warm days of spring. This gives you time to identify performance or electrical problems and organise repairs or replacement before sustained summer heat increases demand for air-conditioning services.
What are the signs that an air conditioner needs attention?
Warning signs include weak airflow, slow cooling, unexpected shutdowns, unusual noises, water leaks, electrical smells and circuit breakers or safety switches tripping when the system operates. Stop using the system and arrange an assessment if there are signs of an electrical fault.
What temperature should I set my air conditioner to in summer?
Energex recommends setting an air conditioner to 25 degrees Celsius during summer. It estimates that every degree cooler can add around 10 per cent to the electricity used by the system.
Should air-conditioning filters be cleaned before summer?
Yes. Dusty filters can restrict airflow and make the air conditioner work harder. Clean accessible filters, vents and louvres according to the manufacturer's instructions, but do not remove electrical covers or attempt internal repairs.
Does installing an air conditioner require a switchboard upgrade?
Not every air-conditioning installation requires a switchboard upgrade. An electrician should assess the existing switchboard, circuit protection, available electrical capacity and proposed installation before determining whether additional electrical work is required.
Should I repair or replace an older air conditioner?
The decision depends on the system's age, condition, repair cost, energy efficiency and suitability for the room. A newer system with a straightforward fault may be worth repairing, while an older unit that repeatedly fails or struggles to cool the room may be more economical to replace.