Servicing the Shoalhaven, Wollongong, Kiama, Nowra, Ulladulla, Jervis Bay and Canberra
That’s a warning sign that your air con system needs specialist care straight away!
A simple lack of air conditioning maintenance can void your Mitsubishi warranty and quickly turn a small problem into an expensive repair.
Dunn & Williams Air Conditioning are the local Mitsubishi air con experts throughout the South Coast.
We handle air conditioning supply, installation, maintenance and repairs on all models, using genuine Mitsubishi parts to make sure your system runs exactly as it should.
Don't risk your money with a standard aircon company, call us for the brand-specific experts who know how to get your Mitsubishi AC running properly.
☎️ Call Dunn & Williams Air Conditioning on: 1800 867 185 ☎️
When you buy a Mitsubishi air conditioning unit, you are investing in a premium system air conditioner. Since Mitsubishi systems have complex electronics and run on specific software, you need an expert; a standard repair guy won't cut it!
You need a brand-specific aircon technician who knows the system inside out to make sure it lasts a long time.
Your Mitsubishi warranty is the biggest protection for your investment, but it's only valid if you follow the service rules.
❌ Skipping regular maintenance can void your warranty, meaning if a major component fails, you could be stuck with a huge repair bill.
✔️ Our experienced HVAC technicians service your unit just the way Mitsubishi tells us to. This gives you the paperwork you need to keep your warranty safe.
To make sure your premium system runs reliably, we guarantee we only use genuine Mitsubishi parts for any repair.
❌ Using cheaper, non-genuine parts might save a few bucks now, but it puts your whole system's longevity at risk and often voids the official manufacturer warranty straight away.
✔️ Our commitment means your system runs exactly as Mitsubishi built it: quietly, efficiently, and for years to come.

When your Mitsubishi starts making noise or stops cooling properly, it needs a full service; not just a filter clean.
Our service is all about getting back the performance you paid for. We make sure the whole system is running at peak energy efficiency.
Mitsubishi units are complex systems with lots of tricky sensors and electronics. Our team knows exactly how to find any issues those parts:
🔎 Board Diagnostics
We check the control boards and wiring right through. This is how we find any faulty parts before they cause a complete system shutdown.
🔎 Sensor Calibration
We check and fix the thermostat and pressure sensors that control temperature. When they are out of whack, the AC unit runs badly and costs you extra money.
🔎 Software Updates
We check for software updates. This makes sure your unit has the latest program installed so it can run at its most efficient. This is crucial as inverter technology relies on up to date software.
You shouldn't hear a healthy unit. We take care of the physical issues that are making your system noisy and inefficient.
⚙️ Deep Coil Clean
We deep clean the coils inside and out to clear out mould, dirt, and dust. This ensures air quality is clean and healthy.
⚙️ Drain & Alignment
To stop buzzing / vibrating, we clear the blocked drain and check the motor alignment. Clearing that blockage also fixes leaks in the indoor unit. This ensures cooling in all zones.
⚙️ Refrigerant Level Check
We check for pressure leaks. If needed, we top up the gas to make sure your unit can cool and deliver warm air at its best.

The constant high humidity and salt air make the outdoor unit a target for corrosion and rust.
Your condenser needs extra help to survive the coastal elements.
We are experts at protective maintenance for both home and commercial systems: we clean the coils, check for salt build up, and fit anti corrosion coatings to the casing and exposed parts.
This is how we make sure your Mitsubishi AC system is protected from the damaging climate, so it keeps working great for years.
Ready to find the right air conditioning system for your property without the hassle? Our experienced HVAC technicians provide complete air conditioning solutions that are tailored to your needs. We handle every detail, ensuring low energy bills and guaranteed air quality throughout Illawarra, Shoalhaven, Shellharbour, Canberra and surrounding areas.
To speak with one of our team today, please call 1800 867 185 or complete our online booking form today.