Common Mistakes to Avoid During Aircon Installation
Biggest mistake going—people either buy units too small that can’t cope or massive ones that short-cycle and waste power. That 2.5kW unit might’ve been on sale, but it’s not cooling your massive open-plan lounge. Get a proper load calculation done before purchasing anything. Undersized units run constantly and die early, oversized ones cost a fortune to run.
Outdoor Unit in Stupid Locations
Sticking your condenser in full sun all day makes it work harder and costs more to run. Jamming it against a wall with no airflow? Same problem. People also put them under bedroom windows then wonder why they can’t sleep through the noise. Leave proper clearance, consider afternoon sun, and think about where the noise goes.
Ignoring Electrical Requirements
Your existing power circuit probably can’t handle a new aircon. Running it off an overloaded circuit trips breakers constantly or, worse, starts electrical fires. Aircon installation needs dedicated circuits with correct cable sizing and safety switches. This isn’t optional—it’s life and death stuff that requires a licensed sparky.
DIY Refrigerant Work
Blokes watch YouTube and reckon they can charge their own refrigerant. You can’t legally buy it without licensing, and guessing the charge level wrecks compressors within months. Too much refrigerant is as bad as too little. This job requires proper equipment, certification, and someone who knows what they’re doing.
Terrible Indoor Unit Placement
Mounting your split system directly above your bed or the telly seems convenient until you’re sleeping in a wind tunnel or can’t hear the footy. Cold air needs to circulate properly without blasting one spot. Also, installing it where furniture blocks airflow completely defeats the purpose.
Cheap Installation to Save Money
Your mate’s brother does aircon installation cash-in-hand for half price? Great, until it leaks, doesn’t work properly, has no warranty, and you need an electrician in Tweed Heads or wherever to come fix the dangerous wiring. Licensed installers cost more upfront but include warranties, compliance certificates, and work that doesn’t burn your house down.
Forgetting About Drainage
Condensate has to drain somewhere. Routing it incorrectly causes water damage to walls, mould growth, or puddles that wreck your outdoor paving. Professionals slope drain lines properly and include overflow protection. DIY jobs often ignore this until water starts appearing somewhere inconvenient.
No Service Access
Installing units in spots where nobody can service them is phenomenally stupid. Technicians need space to work on both indoor and outdoor components. When your unit needs repairs and the tradie can’t physically reach it, you’re looking at expensive relocation costs before they’ll even start.
Skipping the Paperwork
Electrical compliance certificates, council approvals, manufacturer registrations—this stuff matters. When you sell your house, buyers’ building inspections flag uncertified electrical work. You’ll either cop a reduced sale price or pay to get it certified retrospectively, which costs more than doing it right initially.
Just Get Professionals In
Every shortcut during reliable aircon installation creates problems that cost more to fix than proper installation would’ve cost. Licensed installers, correct sizing, proper placement, compliant electrical work—it’s not exciting but it’s how you get aircon that actually works for the next decade-plus without constant drama.