Getting your air conditioner ready for a Perth summer: a pre-season checklist

Perth’s summer puts real strain on air conditioning systems, running for months at a time through consistently hot weather. Getting ahead of it with a straightforward pre-season check is one of the simplest ways to avoid a system letting you down exactly when you need it most. Our AC repair and servicing hub lists Perth contractors who handle this kind of seasonal check.

Why timing matters

Booking a service in late winter or early spring, before the seasonal rush, means two things work in your favour: you get a choice of appointment times rather than whatever’s left once everyone else has had the same idea, and any fault found gets fixed while it’s still a minor job rather than turning into an emergency during the first serious heatwave. Once summer hits, wait times for a technician stretch out fast, and a fault that would have taken a quick visit in spring can mean days without cooling in peak heat.

The checklist

What you can reasonably check yourself:

• Clean or replace filters if they’re visibly dusty, this is the single easiest thing that affects both performance and running cost.
• Clear leaves, debris or overgrown plants from around the outdoor unit, since restricted airflow around the compressor reduces efficiency.
• Check that vents inside aren’t blocked by furniture or curtains.
• Note any unusual noise, smell or reduced cooling from last summer so you can flag it to a technician.

What needs a licensed technician:

• Refrigerant level check and top-up if needed.
• Coil inspection and clean if there’s visible buildup.
• Condensate drain check and clear.
• Electrical connections and isolator switch inspection.
• A full test run checking pressures and airflow against the system’s specification.

Signs it’s worth booking sooner rather than later

A few things suggest a system needs attention before the season starts properly, rather than waiting for a routine annual service: cooling that felt noticeably weaker by the end of last summer, a musty smell on startup, unusual noise from either the indoor or outdoor unit, or a system that’s more than 10 to 15 years old and hasn’t had a full inspection in a while. None of these are guaranteed problems, but they’re worth a technician’s assessment rather than assuming everything’s fine until it isn’t.

Timing	What’s happening	Why it matters
Late winter to early spring	Book a full service	Best appointment availability, faults caught early
Just before first heat	Quick DIY filter check	Confirms the system is ready to run hard
Mid-summer, if issues arise	Priority repair, longer wait times	Demand is highest, book as early as symptoms appear
End of summer	Note any issues for next spring’s service	Sets up an easier start to the next cooling season

Making the most of the appointment

When you book, mention anything you noticed toward the end of last summer, since that gives the technician somewhere specific to look rather than a generic once-over. Ask them to check the condensate drain and coil condition specifically if your household deals with allergies, since that’s exactly where buildup tends to cause the most noticeable air quality issues.

If you’re managing more than one system

Households or landlords with several units, a split system in each bedroom plus a ducted system in the living areas, for example, benefit from booking all of them in the same visit where possible. It’s usually more efficient than staggering separate callouts, and it means every system in the property gets checked before the season starts rather than the one that’s been making noise getting priority while the others go unchecked.

What to do if you’ve already missed the early window

If spring has come and gone and you haven’t booked anything, it’s still worth calling before the first real heatwave rather than waiting for a fault to force the issue. Appointment availability tightens up fast once hot weather actually arrives, and a system that’s overdue for a check is more likely to develop a problem exactly when demand for technicians is highest.

For more on how we assess and rank local contractors, see our methodology page, and visit the home page for other guides on keeping a system running well through the year.