Common problem
Air Conditioner Not Cooling in Plympton
An air conditioner not cooling is the most common call we get in Plympton, and Plympton Air Conditioning fixes it fast. Here's what usually causes it and what to check first.
Trusted Aircon Diagnosis From a Local Plympton Team You Can Call
You want the room cold again, not a lecture. Plympton households call us when a split system or ducted unit runs fine but pushes out warm air, and we diagnose the real fault before quoting a cent. Fixed Upfront Pricing applies to every job.
Why Your Aircon Stops Cooling
A unit that runs but doesn't cool has a short list of usual suspects, and some cost nothing to fix. Here's what we find behind most callouts across the suburb's post-war brick homes and newer infill units:
Dirty filters and coils
Blocked filters starve the indoor unit of airflow, so the coil ices over and the room never drops. It's the cheapest fault on this list and the one a clean prevents.
Low refrigerant
Refrigerant doesn't wear out, so low gas means a leak somewhere. We find the leak, repair it and recharge, because topping up alone just loses the gas again.
Compressor and capacitor faults
A weak capacitor makes the compressor struggle on hot afternoons, which is exactly when you notice. Common parts ride on the van, so many of these are fixed on the first visit.
Ducted airflow problems
In ducted air conditioning, a crushed or disconnected duct above the ceiling cools one room and starves the rest. We trace the run and repair it properly, not with tape.
Simple Checks Before You Call
A few things take two minutes and cost nothing, and they rule out the silly causes. Work through this list before you book:
- Check the thermostat is on cooling, not heating, with a set point below room temperature
- Pull the filter and hold it up to the light; if you can't see through it, clean it
- Look at the outdoor unit for ice, debris or a fan that isn't spinning
- Make sure doors and windows in the cooled zone are actually shut
If the filter was filthy, clean it and give the unit an hour. A frozen coil needs that long to thaw before cooling returns.
Do not wait on this
When a Cooling Problem Needs a Technician
Some faults are DIY, and some are genuinely not. Call us the same day if you notice any of these:
- Ice on the pipes or the indoor unit while it runs
- A hissing sound near the outdoor unit, which can be refrigerant escaping
- The breaker tripping every time the compressor starts
- Warm air from a ducted system across every room at once
Refrigerant work is licensed for a reason, and guessing at it costs more than the callout. On a 40-degree Plympton afternoon, a struggling compressor also gets worse fast, so early beats late.
How it works
How We Fix Air Conditioner Not Cooling Faults
Diagnosis comes first, always, because the symptom hides several different causes. Our repair visit runs like this:
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Step 1: Step 1
We test airflow, temperatures and electrical draw to find the actual fault
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Step 2: Step 2
You get the price in writing before any work starts, no hourly rates
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Step 3: Step 3
We carry common parts like capacitors and controllers, so most fixes happen on the spot
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Step 4: Step 4
Anything rarer is ordered against your model and serial number, and we book the return visit
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Step 5: Step 5
We test cooling at the vents before we leave, and the Lifetime Labour Warranty covers our workmanship
Every refrigerant job sits under ARC Licence L162586, the full RAC01 refrigeration and air conditioning licence, so the handling is done properly and legally.
Repair or Replace? The Cooling Decision
Age changes the maths. Plenty of Plympton owners live in homes they've held for decades, and some are still running the split system from a renovation in the 2000s.
Repair wins when
Replacement wins when
A 1960s or 1970s infill unit with one living area often suits a fresh split system better than patching an old one, and sizing matters more than brand. We fit Daikin, Mitsubishi Electric, Fujitsu and ActronAir, and we'll recommend honestly for your rooms.
Questions
Air Conditioner Not Cooling FAQs
Why is my air conditioner running but not cooling?
Usually a dirty filter or coil, low refrigerant from a leak, or a failing capacitor, and each needs a different fix, so a proper diagnosis on site is the only honest answer.
Can I add refrigerant to the unit myself?
No, refrigerant handling is licensed work in Australia, and topping up without finding the leak just delays the real repair while the gas escapes again.
How quickly can you get here for a cooling fault?
We offer 24/7 emergency availability and a Within-the-Hour Response for urgent issues where availability allows, and we'll give you a real time frame when you call.
Is it worth repairing an older system that cools poorly?
Often yes, but if the unit is past ten years old, the repair is costly and the power bills keep climbing, we'll show you both options with numbers before you decide.
Talk to a local
Book a Cooling Repair With Plympton Air Conditioning
Don't sweat through another heatwave night waiting on a maybe. Call (08) 8246 6298 now, tell us the fault, and we'll get a technician out with a fixed quote and the $50 off first service offer for new customers. A unit that won't cool is a job for today, not next week.