Precision Diagnostics | Professional Repairs
At WestCoast Auto Airconditioning,
We diagnose and repair both heating and cooling system issues
So you get your desired temperatures all year round
We Are You Automotive Climate System Specialists
We Specialize in
- Air Conditioning Regas
- Dash Removals
- Diagnostics (Fault Finding, Testing & Repairs)
- Heater Core Repairs & Heating System Servicing
- Custom Air Conditioning Hose & Hard Line Manufacturing
- Anti-Bacterial Air Conditioner Cleaning & Odour Removal
- R12 to R134a Retrofitting For Classic Vehicles and Older Model Cars
+ More!
YES! We specialize in both Heating Diagnosis and repairs as well as Cooling Systems.
Some A/C and heating issues are minor, but others can signal bigger problems—especially in the cooling system where overheating can quickly damage internal engine components. If your temperature gauge starts climbing or you see warning lights, stop driving and have it checked to avoid costly damage like warped cylinder heads or blown head gaskets.
With A/C, low refrigerant isn’t just “less cold air”—it can reduce lubrication in the system and force the compressor to work harder, which can lead to premature compressor failure. That’s why we diagnose first, confirm the cause (like leaks or control faults), and fix it properly rather than just topping it up.
Most commonly it’s low refrigerant (often from a leak), a pressure/sensor issue, or a compressor/fan fault. We’ll diagnose it first so you don’t waste money on guesses.
A regas helps ONLY if the system is low. If it’s low because there’s a leak or another underlying fault, it’ll fix the problem briefly and then go warm again—so we start with a proper diagnosis (pressure testing and system checks) to find the cause and fix it properly the first time.
Heater issues are often caused by low coolant, a thermostat not regulating temperature correctly, or a problem with the heater controls. Because multiple faults can cause the same symptoms, we run a proper diagnosis of the heating circuit to pinpoint the exact cause—so you’re fixing the issue, not just guessing.
We are conveniently located at 65 Gordon Road, Greenfields, Mandurah WA 6210 – opposite Frederick Irwin Anglican School and next to Toolmart and Tyre Right. Easy access from all Peel Region suburbs including Halls Head, Falcon, Dawesville, and Erskine.
To ensure the highest quality of service, we recommend allocating approximately half a day to a full day for most air conditioning repairs and diagnostics. This allows our experienced technicians sufficient time to conduct a thorough diagnosis using specialist equipment and complete any necessary repairs with precision. We keep you updated throughout, though complex issues may require additional time.
We recommend servicing your car air conditioning every 1–2 years, depending on your vehicle's make, model, and usage. Regular servicing is especially important in Western Australia's harsh heat and coastal conditions around Mandurah and the Peel Region to prevent costly breakdowns and maintain efficient cooling.
The best number to call is 9581 7794. We're ready to help with bookings, quotes, or advice for car air con regas, repairs, or diagnostics in Mandurah.
A healthy vehicle air conditioning system typically loses 1–2% of refrigerant per year through natural permeation in seals and hoses. If your A/C is not cooling effectively in Mandurah's extreme heat, low refrigerant or a leak may be the cause – schedule an inspection at our Gordon Road workshop.
Your vehicle's air conditioning system operates as a sealed, closed-loop circuit that circulates refrigerant (not consumed like fuel) through components including the compressor, condenser, expansion valve, and evaporator. Unlike a barbecue where gas is burned, refrigerant is recycled continuously via hoses and pipes to remove heat and moisture from the cabin air.
Yes, we strongly recommend bringing your vehicle to our Mandurah workshop for custom hose or pipe manufacturing and repairs. This ensures perfect fitment, correct routing to prevent future damage, and accurate on-vehicle pressure testing for lasting results.
1. Blowing Warm Air
Why it happens: Low refrigerant, leaks, or compressor/control faults.
If ignored: Can overwork the compressor and lead to costly failure.
2. Weak Air Flow
Why it happens: Blocked filter, blower issues, or vent/door faults.
If ignored: Strains components and can cause evaporator icing.
3. Strange Smells or Noises
Why it happens: Moisture/mould buildup or worn bearings/compressor.
If ignored: Contamination spreads and repairs can escalate fast.
4. A/C Constantly Cycling On/Off
Why it happens: Pressure issues, low gas, sensor faults, or weak compressor.
If ignored: Accelerates wear and can trigger bigger system damage.
5. Windows Not Demisting Properly
Why it happens: A/C isn’t dehumidifying correctly.
If ignored: Safety risk + more moisture and odours in the cabin.
Experiencing inconsistent temperatures or weak airflow? Our team uses precise diagnostic tooling and equipment to accurately identify the root cause—no guesswork, just clear answers and the right solution.
Not getting the cooling performance you expect? We carry out thorough servicing to restore efficiency and ensure your system operates reliably at its best.
Dealing with deeper system faults that can’t be accessed easily? Our team performs careful, high-quality dash removals to reach and repair internal components properly.
If your cabin heat is weak, inconsistent, or you're noticing coolant smell or fogging, the heater core may be failing. We diagnose the cause accurately, then repair or replace the heater core properly to restore safe, consistent heating.
