When it comes to air conditioning, it’s usually obvious if your system isn’t keeping you cool, something’s wrong. But not all AC problems are easy to spot.
In fact, many issues develop without obvious symptoms and can only be uncovered through a professional inspection. That’s where our team comes in: not only can we diagnose air conditioner problems, but we can also help you recognise the subtle warning signs before they become costly repairs.
Common Air Conditioning Problems and Their Symptoms
1. Why has my AC suddenly stopped working?
Let’s start with the most obvious sign of trouble, your AC won’t turn on.
Common culprits include:
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A tripped circuit breaker or blown fuse
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A faulty or incorrectly set thermostat
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An internal switch that’s turned off
Unlike other problems, these typically cause a total system shutdown, something that’s hard to miss.
2. Unwelcome smells and odours
“What’s that smell?”
Believe it or not, it could be your air conditioner. Over time, filters can collect dust, dirt, and bacteria. If not cleaned, these build-ups can create unpleasant odours that circulate through your home.
The fix is simple: regularly clean your filters. A quick wash can make all the difference in restoring clean, fresh air.
3. High power usage
Your home may feel cool, but your electricity bill tells a different story.
A sudden spike in power usage can point to problems such as:
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Low refrigerant levels
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Electrical or wiring faults
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General inefficiency causing your system to overwork
When your AC works harder than it should, your energy bills will feel the impact.
How to Fix Common Air Conditioning Problems
While some issues require professional help, there are a few simple fixes you can do yourself.
Cleaning air conditioning filters
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In split systems, filters are located in the indoor unit under the front panel.
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In ducted systems, you’ll find them behind the return grille in your ceiling or wall.
To clean:
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Vacuum the dust and debris.
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Wash with warm, soapy water.
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Let them dry completely before reinstalling.
If cleaning doesn’t solve the issue, it may be time to book an aircon service in Brisbane.
Checking refrigerant levels
Refrigerant (often mistakenly called Freon) is essential for cooling. If levels are low, your AC can’t function properly.
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Newer systems may display a warning on the thermostat.
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Older systems typically require a licensed technician to check and refill refrigerant.
Refrigerant handling is dangerous and must only be done by a licensed professional.
Resetting your air conditioning unit
Some minor faults can be fixed by resetting your system.
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Many units have a reset button on the outdoor compressor refer to your manual for location and instructions.
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If not, you can turn the system off at your switchboard. Leave it off for at least 30 minutes before restarting.
Get Your System Looked After by Brisbane’s Air Conditioning Experts
With over 30 years of experience, Tri-Tech is one of Brisbane’s most trusted air conditioning specialists.
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Licensed technicians for leading brands, including Mitsubishi Electric and Daikin
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Servicing homes and businesses across Brisbane
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Skilled in repairs, maintenance, and upgrades
Our team are authorised technicians for both Daikin and Mitsubishi systems, along with many other leading brands. No matter what you own, we’ve got the skills to keep it running at its best. Call (07) 3394 0222 or contact us today.
