When a Mitsubishi Canter rolled into the workshop with an air con system that couldn’t hold its gas, we knew guesswork wasn’t going to cut it. 🔍 Warm air, repeated refills, and no obvious signs of trouble — a classic case of a hidden leak playing hide and seek. Instead of throwing refrigerant at the problem and hoping for the best, we broke out the Loktrace leak detector and got to work finding the real culprit. 🚚
Why Air Con Leaks Are So Tricky to Find
Automotive air conditioning systems operate under significant pressure, and even the smallest pinhole in a hose, fitting, condenser or evaporator can bleed refrigerant over weeks or months. In light commercial vehicles like the Mitsubishi Canter, extra vibration, long service hours and exposure to the elements mean components are working harder than in a typical passenger car. Common leak points include:
- O-rings and flare fittings at hose junctions
- Condenser cores damaged by stone chips or corrosion
- Evaporators buried deep in the dash
- Compressor shaft seals worn from age or lack of use
Traditional soap-and-water tests or UV dye can miss slow leaks entirely, particularly when the fault sits behind trim or inside the HVAC housing. That’s where tracer gas diagnostics change the game.
How the Loktrace Diagnosis Works
The Loktrace system uses a hydrogen-nitrogen tracer gas blend that’s pushed through the evacuated air con circuit. Because the gas molecules are extremely small, they escape through even microscopic leaks that refrigerant can mask. The handheld sensor then sweeps across suspect components, and its LED indicator shifts from green to red the moment it detects escaping gas.
The Result on the Canter
Within minutes the detector lit up like a disco, pinpointing the exact leak location. No stripping the dash on a hunch, no repeated regas visits, and no wasted refrigerant venting into the atmosphere. Just a targeted repair, a full vacuum test, and a proper regas to manufacturer specification. The Canter left with cold air pouring from the vents and a system that will actually hold its charge.
Book Your Air Con Diagnosis in Perth
If your car, ute or truck air con is blowing warm, cycling oddly, or losing gas between services, don’t settle for a top-up that only lasts a few weeks. Romano’s Automotive in Perth uses professional-grade leak detection equipment to find the fault first time, saving you money and downtime. Book online at our booking portal or give the workshop a call on 0401 747 320 or 0483 932 306 to get your cooling sorted before the next Perth heatwave hits.
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