Mobile Car Air Conditioning Perth services are not always about regassing a system that has stopped blowing cold air. Sometimes the problem is electrical, as we recently discovered with a Mitsubishi in Canning Vale.
The owner contacted CMM Automotive because the air conditioning was working intermittently. Sometimes it worked normally, while at other times it would not operate at all. This made the fault difficult to predict.
Mitsubishi Air Conditioning Not Working
When diagnosing an intermittent air conditioning problem, we should not automatically assume the refrigerant level is low.
A car air conditioning system relies on several electrical and mechanical components working together.A faulty switch, relay, sensor or wiring connection can stop the A/C system from working. Other components may still operate correctly.
During our inspection of this Mitsubishi in Canning Vale, we investigated why the air conditioning was working intermittently.
Testing eventually led us to the air conditioning switch located in the dashboard.
Faulty Dashboard A/C Switch
The dashboard air conditioning switch was developing an intermittent fault.
Sometimes the switch operated correctly and allowed the air conditioning system to function. At other times, it failed to send the required signal. As a result, the A/C system would not operate.
This explained why the owner had experienced such inconsistent behaviour.
Intermittent electrical faults can also make diagnosis more difficult. If the component happens to work while the vehicle is being inspected, the problem can easily appear to have disappeared.
That is why understanding the customer’s description of when and how the problem occurs can provide valuable information during car air conditioning fault diagnosis.
Not Every A/C Problem Needs a Regas
This Mitsubishi is also a good example of why an air conditioning system should be properly diagnosed before automatically adding refrigerant.
A regas would not have repaired the faulty dashboard switch.
The system needed the electrical control problem identified so the actual cause could be addressed.
At CMM Automotive, our Mobile Car Air Conditioning Perth service focuses on finding the reason an A/C system is not operating correctly before recommending repairs.
Depending on the symptoms, this can involve checking refrigerant levels and pressures, looking for leaks, measuring vent temperatures and inspecting the operation of electrical and mechanical components.
Intermittent Car Air Conditioning Problems
If your car’s air conditioning works one day but not the next, there are several possible causes.
Electrical switches and relays can develop worn internal contacts. Wiring connections can also become intermittent, while sensors and control components may occasionally provide incorrect signals.
Some faults may also appear after components become hot and then disappear again once the vehicle cools down.
For this reason, an intermittent A/C problem should not automatically be treated as a refrigerant issue.
Mobile Car Air Conditioning Service in Perth
Having the vehicle inspected while the fault is occurring can make intermittent problems easier to diagnose.
CMM Automotive provides mobile car air conditioning service in Perth, allowing many A/C problems to be investigated at the customer’s home or workplace.
In the case of this Mitsubishi in Canning Vale, diagnosing the faulty dashboard air conditioning switch identified why the system would sometimes work and sometimes refuse to operate.
If your vehicle’s air conditioning is blowing warm air, operating intermittently or has stopped working completely, CMM Automotive can inspect the system and determine what is causing the problem.
Correct diagnosis can help avoid replacing unnecessary components or paying for an A/C regas that will not repair the actual fault.
