Mobile Car Air Conditioning Perth diagnosis involves much more than checking whether a vehicle needs an A/C regas. We recently inspected a Nissan in Hocking with an air conditioning system that was not operating correctly.

The Nissan had poor air conditioning performance, so CMM Automotive tested the system to find the cause. Our diagnosis identified a faulty TX valve, also known as a thermal expansion valve.

This small component plays an important role in controlling refrigerant flow through the air conditioning system.

Nissan Air Conditioning Not Cooling Properly

Poor cooling from the vents can have several possible causes.

Low refrigerant is one possibility. However, compressors, condensers, electrical components and TX valves can also cause poor A/C performance.

For this reason, we did not assume that the Nissan simply needed more refrigerant.

Testing the system allowed us to investigate how the air conditioning was operating. The results eventually led us to the faulty TX valve.

What Does an A/C TX Valve Do?

The TX valve controls the amount of refrigerant entering the evaporator.

It needs to regulate refrigerant flow as the operating conditions of the air conditioning system change. This helps the evaporator work efficiently and produce cold air through the vehicle’s vents.

If the TX valve stops working correctly, refrigerant flow can become restricted or poorly controlled.

The result can be poor cooling performance from the air conditioning system.

Symptoms of a Faulty TX Valve

A faulty TX valve can produce symptoms that may initially appear similar to other A/C problems.

The air from the vents may not become cold enough. Cooling performance may also vary under different driving conditions.

System pressures can also provide useful information during diagnosis.

However, poor cooling alone does not confirm that the TX valve has failed. The complete A/C system needs to be assessed before replacing components.

Our Mobile Car Air Conditioning Perth service focuses on identifying the actual cause of the problem.

Why Proper A/C Diagnosis Is Important

Simply adding refrigerant will not repair a faulty TX valve.

This is why CMM Automotive tests the air conditioning system before recommending repairs.

Several faults can produce similar symptoms from inside the vehicle. The driver may only notice that the vents are blowing warm or slightly cool air.

The cause could be very different under the bonnet or inside the A/C system.

Testing pressures and system performance helps us narrow down the possibilities. We can then identify the component responsible for the fault.

For this Nissan in Hocking, the diagnosis identified the TX valve as the problem.

TX Valve Faults and Refrigerant Flow

The TX valve has an important job despite its relatively small size.

Too little refrigerant flow through the evaporator can reduce cooling performance. Incorrect refrigerant control can also affect how efficiently the system operates.

A correctly functioning TX valve responds to changing A/C conditions. A faulty valve may no longer regulate that flow properly.

Replacing refrigerant alone cannot correct this type of mechanical fault.

Mobile Car Air Conditioning Service in Perth

CMM Automotive provides mobile car air conditioning service in Perth for a wide range of A/C problems.

We can investigate systems that blow warm air, cool poorly or operate intermittently. Our testing can also help identify refrigerant leaks and component faults.

This Nissan in Hocking is a good example of why diagnosis should come before replacing parts or regassing the system.

The poor A/C performance was caused by a faulty TX valve. Finding the actual fault allowed the correct repair to be recommended.

If your vehicle’s air conditioning is not getting cold enough, it does not automatically mean it needs more gas.

CMM Automotive can inspect the system at your location and investigate what is causing the problem. Correct diagnosis can save time and help avoid unnecessary A/C repairs.