Mobile Car Air Conditioning Perth recently attended a Jeep in Balga with an air conditioning system that was no longer working correctly. The owner had no effective air conditioning and needed the system professionally diagnosed.
CMM Automotive attended the Jeep and carried out several tests at the vehicle’s location.
The system initially passed a vacuum test without showing an obvious problem. However, we continued testing rather than assuming the system was leak-free.
A nitrogen pressure test produced a different result. We used our air conditioning analyser at the interior vents and detected refrigerant coming through the dash area.
This indicated a leak within the air conditioning system behind the dashboard.
Jeep Air Conditioning Not Working
A car air conditioning system can stop cooling for many reasons.
Low refrigerant is a common cause. However, refrigerant doesn’t simply disappear from a sealed system without a reason.
A leak may develop in the condenser, hoses, seals or other air conditioning components. Leaks can also occur within components located behind the dashboard.
Finding these leaks can require more than one type of test.
This Jeep in Balga provided a good example.
Vacuum Testing the Jeep Air Conditioning System
CMM Automotive began by vacuum testing the air conditioning system.
Vacuum testing forms an important part of air conditioning diagnosis and servicing. It can help identify leaks before charging the system with refrigerant.
In this case, the Jeep showed no obvious problem during the vacuum test.
It would have been easy to stop testing at this point.
However, we wanted to make sure the system could also hold pressure correctly.
Nitrogen Pressure Testing Found the Problem
We then pressure tested the Jeep’s air conditioning system with nitrogen.
Nitrogen testing allows us to place the system under positive pressure. This can expose leaks that may not appear during a vacuum test.
The pressure test gave us the information we needed.
We then used an air conditioning refrigerant analyser at the Jeep’s interior vents. The analyser detected refrigerant coming through the dash vents.
This result indicated a refrigerant leak behind the dashboard.
Why Would Refrigerant Come Through the Air Vents?
The evaporator forms part of the vehicle’s air conditioning system and normally sits inside the HVAC housing behind the dashboard.
Air passes across the cold evaporator before travelling through the vents and into the cabin.
A leak in this area can allow traces of refrigerant into the HVAC housing. The blower fan may then carry those traces through the interior vents.
Using suitable electronic detection equipment at the vents can help identify this type of hidden leak.
Without proper testing, finding a leak behind the dashboard can be difficult.
Why Different Aircon Tests Matter
This Jeep demonstrates why CMM Automotive doesn’t rely on a single test when diagnosing every air conditioning problem.
The system appeared acceptable during the vacuum test.
The nitrogen pressure test told us something different.
Pressure and vacuum place different forces on seals and components within the air conditioning system. Some faults may become more noticeable under positive pressure.
Using several diagnostic methods can give us a clearer picture of the system’s condition.
This approach helps us find the actual fault before recommending repairs.
Why We Don’t Just Regas a Leaking Aircon System
Simply adding R134a refrigerant would not repair a leak behind the dashboard.
The air conditioning might begin cooling again after a regas. However, refrigerant could escape again through the existing leak.
The customer would eventually return to the same problem.
This is why CMM Automotive focuses on car air conditioning diagnosis in Perth before recommending a regas or repair.
We want to understand why the system stopped cooling.
Mobile Car Air Conditioning in Balga
CMM Automotive provides mobile air conditioning diagnosis throughout Balga and the Perth metropolitan area.
We bring professional air conditioning equipment directly to your home or workplace.
Our services include performance testing, leak detection, vacuum testing and nitrogen pressure testing. We also diagnose compressor and other air conditioning faults.
Where possible, we identify the cause before recommending repairs.
This can prevent unnecessary parts replacement and repeated regassing.
Car Air Conditioning Not Working?
If your vehicle’s air conditioning has stopped cooling, the system may need more than a simple regas.
A refrigerant leak can occur in several different areas of the system. Some leaks can remain hidden behind the dashboard.
CMM Automotive provides Mobile Car Air Conditioning Perth services for many common air conditioning problems.
We can test the system, explain what we find and recommend the appropriate next step.
Frequently Asked Questions
Can a car aircon system pass a vacuum test and still leak?
Yes. Some leaks may behave differently under vacuum and positive pressure. Further testing can help locate difficult air conditioning leaks.
Why would refrigerant appear at the dashboard vents?
A leak within the HVAC housing can allow traces of refrigerant into the airflow. The blower may then carry those traces through the vents.
Why does CMM Automotive use nitrogen pressure testing?
Nitrogen pressure testing can help locate leaks without unnecessarily adding refrigerant to a faulty system.
Does CMM Automotive provide mobile aircon diagnosis in Balga?
Yes. CMM Automotive provides mobile car air conditioning diagnosis and repairs throughout Balga and the Perth metropolitan area
