7 Signs Your Air Conditioner Might Fail This Summer

Air conditioners rarely stop working out of nowhere.

Most systems actually give small warning signs for weeks — sometimes months — before a major breakdown happens. The problem is, those signs are easy to ignore during the cooler months.

Then summer arrives in the South West.

The temperature climbs into the high 30s, Christmas holidays kick off, the house fills with people, and suddenly the system that “was probably fine” can’t keep up anymore.

Across Bunbury, Busselton, Dunsborough and Margaret River, we see the same issues appear every year once the first proper heatwave hits.

Here are some of the biggest warning signs your air conditioner may be heading toward trouble this summer.

1. It’s Taking Much Longer to Cool the House

One of the earliest signs something’s wrong is reduced cooling performance.

If the system:

• runs constantly

• struggles during hotter afternoons

• takes far longer to cool rooms

• or never quite reaches temperature

…it usually means efficiency has started dropping.

That could be caused by:

• dirty filters

• blocked coils

• refrigerant issues

• airflow restrictions

• aging components

In South West summers, these problems become much more noticeable once consecutive hot days arrive around January.

2. Your Power Bills Suddenly Jump

Air conditioners naturally use more energy during summer, but sharp increases in running costs often point to underlying problems.

A struggling system works harder and longer just to maintain the same temperature.

Older systems across Bunbury and Busselton are especially prone to this, particularly if they haven’t been serviced regularly.

3. Weak Airflow From Vents or Indoor Units

If airflow feels noticeably weaker than normal, the system may be dealing with:

• clogged filters

• fan issues

• blocked ducts

• internal buildup

• failing motors

Weak airflow doesn’t just reduce comfort. It forces the entire system to operate under more stress during peak heat.

4. Strange Smells When the System Starts

A musty smell when the system turns on is usually a sign the unit needs professional cleaning.

Over time, moisture buildup inside systems can lead to:

• mould

• bacteria

• dust accumulation

This is especially common in coastal South West homes around Dunsborough, Busselton and Dalyellup where humidity and sea air affect systems over time.

Burning or electrical smells should never be ignored and should be inspected immediately.

5. The System Is Noisy

Modern systems are generally quiet.

So if your air conditioner suddenly starts making:

• rattling sounds

• buzzing

• grinding

• vibration noises

• clicking

…it’s often a sign something internally is wearing out or coming loose.

Sometimes it’s minor. Sometimes it’s an early warning of larger mechanical failure.

6. Water or Moisture Around the Unit

Air conditioners naturally create condensation, but visible leaking or excess moisture around the system can indicate:

• blocked drainage

• internal buildup

• damaged components

• refrigerant issues

This tends to become more obvious during humid South West summer conditions.

7. It Hasn’t Been Serviced in Years

Honestly, this is one of the biggest predictors of summer breakdowns.

A lot of systems across the South West run heavily through:

• January heatwaves

• Christmas holidays

• AFL finals season heat

• busy family gatherings

• long weekends

…without receiving proper maintenance for years.

Even high-quality systems eventually struggle without cleaning and servicing.

Why Breakdowns Always Happen at the Worst Time

Air conditioning companies across the South West become busiest during:

• peak heatwaves

• Christmas holidays

• school holidays

• long weekends

That means waiting until the system completely fails often leads to:

• longer delays

• limited availability

• uncomfortable homes

• expensive emergency repairs

Preventative servicing before summer arrives is almost always easier and cheaper.

A Small Problem Is Usually Easier to Fix

The good news is most major breakdowns start as relatively manageable issues.

Catching problems early can:

• reduce repair costs

• improve efficiency

• extend system lifespan

• prevent complete failures

• lower running costs

Especially during long South West summers where systems often run harder than people realise.

Local Conditions Matter

Heating and cooling systems in the South West deal with very specific environmental conditions.

Coastal homes near Yallingup or Busselton face different challenges to inland homes in Harvey or Collie. Salt air, dust, humidity and long seasonal use all affect performance differently.

At Pergo Air, we help homeowners and businesses across the South West keep their systems reliable through professional servicing, cleaning, repairs and preventative maintenance designed specifically for local conditions.