How Often Should You Service Your Air Conditioner?

Servicing is the cheapest insurance you can buy for your air conditioner — but how often is often enough? The answer has two parts: what a professional should do annually, and what you can handle yourself in between. Here's a simple schedule that keeps your system efficient and reliable.

Quick answer: Have your air conditioner professionally serviced once every 12 months, ideally before summer. Clean the filter every few months, or monthly during heavy summer use. Systems that run hard year-round or sit in dusty environments may need servicing more often. Regular maintenance keeps the system efficient, prevents breakdowns, and often satisfies warranty conditions.

The annual professional service

For most home systems, once a year is the right cadence for a full professional service. A qualified technician does the work you can't: cleaning the coils, checking refrigerant levels and inspecting for leaks, testing electrical connections, clearing drainage, and verifying the system performs across its range.

An annual service delivers three things. It maintains efficiency, so the system isn't quietly costing you more each month as grime builds up. It catches problems early, when they're cheap to fix rather than expensive to repair. And it often protects your warranty, since many manufacturers require evidence of routine servicing to honour a claim.

The filter — much more often

The filter is the one piece of maintenance you should handle yourself, and it needs attention far more frequently than an annual service. Clean it every few months at minimum, and monthly during heavy summer use.

Why so often? The filter is the most common cause of poor cooling. As it clogs with dust, it chokes airflow, so the unit works harder, cools less, and runs up your power bill — see why an air conditioner stops cooling. In dusty Western Sydney, filters load up faster than many people realise. Cleaning one is a five-minute job that pays off immediately.

What you can do between services

Beyond the filter, a few simple habits keep things healthy:

Keep the outdoor unit clear of leaves, debris and encroaching garden growth so it can expel heat freely. Wipe down accessible vents and grilles to stop dust building up. Watch and listen for changes — unusual noises, weaker airflow, or musty smells are early signs something needs a professional look.

The best time to book

Timing matters. Late autumn or spring is ideal — servicing before summer means the system is ready for its heaviest workload, and booking outside the peak rush is far easier than trying to get a technician during a January heatwave when everyone's system is failing at once.

The payoff

A serviced air conditioner runs cooler, quieter, cheaper and longer. Skipping maintenance to save a service fee usually costs far more down the line in higher bills and premature repairs. It's a core part of keeping running costs down, and it's the single best thing you can do to reach the top of your system's lifespan rather than the bottom.

Due for a service, or can't remember your last one? Contact BES to book air conditioning servicing across Hoxton Park and South West Sydney — ideally before the summer rush.