Winterise Your Evaporative Cooler in Melbourne: A Step-by-Step Seasonal Shutdown Guide

Why Winterising Matters

Melbourne’s winters may not be as harsh as those in colder climates, but the city’s seasonal changes still require proper preparation—especially when it comes to your evaporative cooler. Without winterisation, your system could suffer damage, rust, or mould growth, leading to costly repairs or early replacement. Taking a few simple steps in autumn can protect your investment and keep your cooler running efficiently year after year.

Understanding How Evaporative Cooling Works

Evaporative coolers work by drawing warm outside air through water-saturated pads, which then cools and humidifies the air before it’s blown into your home. This water-based operation means the system must be carefully maintained when not in use, particularly over Melbourne’s cooler months when freezing temperatures and moisture can cause problems.

1. Turn Off the Power Supply

Safety First

Always begin by turning off the power to the unit. This prevents accidental activation during maintenance and keeps you safe while working on the system.

Locate and Disconnect Power to the Unit

Find the isolation switch—usually located near the outdoor unit or in your switchboard—and ensure it is turned off.

2. Shut Off the Water Supply

Prevent Freezing and Corrosion

Leaving water in the lines can lead to freezing or corrosion, particularly in overnight cold snaps.

Find and Close the Isolation Valve

Locate the water isolation valve connected to your cooler and turn it off. This stops water from entering the system over the winter period.

3. Drain the Water from the System

Empty the Water Tank and Lines

Open the drain valve or plug to empty the reservoir. You may also need to disconnect or flush the water lines to remove residual moisture.

Prevent Mould, Algae, and Rust

Stagnant water can become a breeding ground for bacteria and algae. Draining the system helps avoid unpleasant odours and mechanical issues.

 

4. Clean the Unit Thoroughly

Remove Pads and Debris

Take out the cooling pads and remove any leaves, dirt, or scale build-up inside the unit.

Wipe Down Interior Surfaces

Use a mild detergent and soft cloth to clean interior panels. Avoid harsh chemicals that could damage the system’s components.

5. Inspect and Replace Pads if Needed

Check for Mineral Build-up or Damage

Inspect the cooling pads for wear, odours, or scale. If they’re discoloured, brittle, or odorous, replace them before next season.

Best Practices for Pad Storage

If the pads are in good condition, allow them to fully dry before storing them in a clean, dry place.

6. Cover the Cooler

Use a Weatherproof Cover

Purchase a breathable, waterproof cover specifically designed for your cooler model. This will protect the unit from dirt, rain, and insects.

Prevent Dust, Debris, and Pests

Sealing off the unit helps avoid nests, insects, or vermin settling inside the housing over the off-season.

 

7. Schedule Professional Maintenance

Benefits of a Technician’s Inspection

While DIY steps are helpful, a licensed technician can perform a more thorough inspection, including checking for corrosion, motor health, and part wear.

Ideal Timing: Late Autumn or Early Winter

Don’t wait until mid-winter. Book your service in late May or early June to beat the seasonal rush.

Why Winterising Saves MoneyReduce Off-Season Wear and Tear

Neglected systems are more likely to corrode or develop blockages, which lead to expensive repairs later on.

Extend Lifespan of the Cooler

Regular maintenance and seasonal care can add years to your system’s life, protecting your initial investment.

Evaporative Cooler Care Tips for Year-Round EfficiencyMonthly Tips During Operating Season

• Clean filters and check water levels

• Inspect for leaks or scale build-up

• Adjust pads if they start to smell

Storage Tips During Off-Season

• Store pads and components in dry conditions

• Keep unit covered

• Check periodically for pests or leaks

Why Trust Boutique Heating and Cooling

If you're unsure how to prepare your system for winter—or prefer to have the peace of mind that it's done right—turn to Melbourne’s trusted specialists.

Expert Care for Evaporative Cooling Systems

We know evaporative coolers inside and out, and we understand the unique demands of Melbourne’s seasonal climate.

Comprehensive Shutdown and Restart Services

From winterisation to spring start-ups, we provide full-service support to keep your unit performing year after year.

Local Experience, Melbourne Focus

Our technicians live and work in South East Melbourne. We understand your needs and deliver personalised, expert care.

A Quick Winter Prep Means Long-Term Peace of Mind

Winterising your evaporative cooler doesn’t take long—but the benefits last all season and beyond. Avoid breakdowns, reduce repair bills, and extend the life of your system with just a few simple steps. And if you want to make sure it's done right, the professionals at Boutique Heating and Cooling are always here to help.

FAQs

1. Can I leave water in my evaporative cooler over winter?

No, stagnant water can freeze, cause corrosion, or lead to mould and bacteria growth.

2. How often should I replace the cooling pads?

Generally, once every 2–3 years, or sooner if they show signs of damage or persistent odour.

3. What happens if I don’t winterise my cooler?

You risk damage from corrosion, blocked pumps, insect infestations, and reduced system efficiency.

4. Should I disconnect power at the breaker?

Yes, always disconnect power to ensure the system doesn’t turn on accidentally and to allow safe maintenance.

5. Is professional winterisation worth it?

Absolutely. Professionals can spot issues you might miss and ensure the system is fully prepared for winter hibernation.