Scorchers Ahead – Is Your Aircon Ready?
If you’ve spent a summer in Perth, you already know the drill: blazing sun, temps soaring above 40°C, and the whole house feeling like a toaster by midday. And while we all crank up the aircon, many Aussies forget one thing – if your split system isn't clean, it's working harder, costing more, and cooling less.
That’s why we’ve put together this easy DIY split system maintenance guide, specially tailored for Perth’s extreme summers. Whether you’re a seasoned home improver or a first-time cleaner, this blog will walk you through:
- Why aircon cleaning matters in WA’s hot climate
- How your split system works (in simple terms)
- Step-by-step DIY cleaning instructions
- Product suggestions that make the job easier
- Maintenance tips to keep it running smooth
- When it might be time to upgrade
- A relatable customer story from right here in Perth
Let’s get that cool air flowing efficiently and affordably!
Why Clean Your Split System? Especially in Perth!
Perth’s climate is no joke. With some of the most intense UV exposure and longest hot spells in the country, air conditioners in WA work overtime. Here’s why that matters:
- Clogged filters mean less airflow. That can lead to uneven cooling and your unit straining to keep up.
- Dust and mould love the humidity. Without regular cleaning, you’re breathing in nasties.
- Power bills skyrocket. A dirty unit uses more energy.
- Your warranty could be void. Some warranties require regular maintenance.
A clean split system doesn’t just save you cash – it keeps your home healthier, too.
How Your Split System Works (No Tech Degree Needed)
Think of your split system as a team effort:
- Indoor Unit: Sucks in hot air, passes it through filters and cooling coils.
- Outdoor Unit (Compressor): Pushes hot air out and keeps the refrigerant cycling.
- Remote Control & Sensors: Manage temp and fan settings.
Now, when filters or coils get blocked, airflow drops, strain goes up, and cooling drops.
Step-by-Step DIY Split System Cleaning Guide
Before you begin, switch off your system at the wall.
1. Remove & Clean the Filters
- Open the indoor panel and gently pull out the mesh filters.
- Give them a soft brush or vacuum.
- Rinse under warm water and let them air dry fully.
🧽 Need a new filter? Find compatible options on our Split System Cleaning Maintenance page.
2. Wipe the Louver Blades and Housing
- Use a microfiber cloth and spray bottle with diluted coil cleaner.
- Gently clean the blades and the front panel.
3. Clean the Cooling Coils (Indoor Unit)
- Use a no-rinse HVAC coil cleaner spray.
- Spray directly onto the coils (follow the product label).
- Let it sit and foam – the grime will drip into the drain tray.
🛠 Recommended: AC Coil Cleaner Foam
4. Check and Clear the Drain Pipe
- If water leaks or smells, the drain line may be blocked.
- Use a flexible brush or suction tool to clear it.
5. Outdoor Unit Check (Condenser)
- Remove leaves, dust and cobwebs from the fins.
- Gently hose the exterior without hitting the fan motor.
- Keep at least 30cm of clearance around the unit.
Aussie Buyer’s Guide: What You Might Need
If it’s your first time tackling AC maintenance, these are our go-to tools and accessories:
- HVAC Cleaning Bag: Catches dripping cleaner from wall units
- Coil Cleaner Spray: Choose one safe for indoor use
- Fin Comb: Straightens outdoor condenser fins
- Filter Replacements: When your current ones are too clogged or torn
👉 Check out the full range on our maintenance collection
Maintenance Must-Knows for Perth Homes
- Clean filters every 2–3 months during summer.
- Deep clean the coils every 6 months or before the heat hits.
- Keep indoor humidity low to avoid mould buildup.
- If you’ve got pets, clean more frequently – fur clogs filters fast!
- Use a programmable timer to reduce system overuse.
When to Upgrade Instead
If your system:
- Is older than 10 years
- Struggles to cool even after cleaning
- Makes unusual noises or odours
- Lacks inverter technology (uses more power)
…it may be more cost-effective to replace it.
💡 A modern split system can be up to 40% more energy efficient, and cleaner air is just a bonus.
Client Story: Meet Jack from Joondalup
"Last summer, I was dreading another 43°C day with our old, wheezy split system. I nearly called it quits on the whole unit. But I stumbled across HVAC Shop and followed their DIY guide. Got myself a coil cleaner and a filter replacement. Mate – the difference was massive. Air flowed better, and the stink was gone. Even my wife noticed. We’re still going strong this summer, thanks to a little elbow grease and the right gear."
Key Takeaways
- Perth’s heat puts extra pressure on split systems – regular cleaning is a must
- DIY cleaning is safe, easy, and affordable with the right tools
- Clean filters and coils boost airflow, reduce power bills, and improve air quality
- Maintenance helps your unit last longer and keeps your cool all summer
- Shop trusted cleaning products locally through HVAC Shop
Stay Cool This Summer
Don’t let a dirty aircon ruin your Perth summer. Stock up on easy-to-use DIY cleaning tools and give your system the refresh it deserves.
🛒 Shop split system maintenance tools now – with fast delivery across WA!
Ready to shop click here at HVAC SHOP
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Coil Cleaner
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Tradie Bag – Heavy-Duty Split System Air Conditioner Cleaning Bag
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Split System Air Conditioner Cleaning Kit
- Split Air Conditioning Cleaning Bag
FAQs
Q: How often should I clean my AC filters in Perth?
A: Every 2–3 months in summer, or more often if you have pets.
Q: Do I need to call a tradie to clean my split system?
A: Not necessarily. Light maintenance like filter and coil cleaning can be DIY with the right tools.
Q: My unit smells musty. What does that mean?
A: Mould or bacteria buildup – clean your coils and drain line ASAP.
Q: What if water is dripping from the unit?
A: Likely a blocked drain pipe. Try cleaning it or contact a technician if it persists.
Q: Will cleaning my split system reduce power bills?
A: Absolutely. A clean system runs more efficiently and cools faster.