Is Your Air Conditioner Ready for Summer? 8 Things to Check Before the Heat Arrives
2 November 2026
Your ducted air conditioner is switched on, but the house still feels warm. Some rooms might be getting cool air while others stay uncomfortable, or there may be very little air coming from the outlets. The pattern can help narrow down where the problem may be.
Start by checking that the controller is set to Cool mode, that the temperature is set below the room temperature, and that the zones you want to cool are switched on. If the settings look right and the house still isn’t cooling, check what’s happening in each room.
Some rooms are cool, but others are warm
If only certain rooms are affected, check that their zones are open on the controller. Then see whether air is coming from the outlets in those rooms.
If a zone is switched on but the airflow is weak or missing, there may be an issue with the zone controls or ductwork. Note which rooms are affected so you can explain the problem when you book a repair.
There’s weak airflow throughout the house
If air is coming from the outlets but it feels weaker than usual across the whole home, check the return air filter if it’s accessible. Follow the manufacturer’s instructions when cleaning it.
If the filter is clean and airflow is still poor, a technician can inspect the system and investigate the cause.
Air is coming from the outlets, but it feels warm
Check that the controller is in Cool mode rather than Fan mode. In Fan mode, the system circulates air without cooling it.
If the settings are correct and the air remains warm, arrange an inspection. If the controller displays an error code, take a photo to share when you book.
The system starts cooling, then stops
An air conditioner may slow down or cycle off once it reaches the set temperature. If the house is still warm when it stops, check whether a timer or schedule is active.
Make a note of how long the system runs before stopping and whether it happens throughout the house or only in certain zones. That information can help the technician investigate the fault.
What to tell us when you book
When you contact Morphett Air, let us know:
- Which rooms or zones are affected
- Whether the airflow is weak, warm or missing
- Whether the problem affects the whole house or only part of it
- Whether the controller shows an error code
- When the problem started and how often it happens
- When the system was last serviced
For basic checks such as filters and controller settings, see our eight-point summer air conditioning checklist.
If your ducted air conditioner is running but your home still isn’t cooling, call Morphett Air on 08 8277 0511 to arrange an inspection in Adelaide.
When it’s too hot or cold to bare, reach for the Morphett Air!
