Car aircon repair Perth services from CMM Automotive help drivers fix faulty vehicle cooling systems. Recently, we attended a Kia in Morley with an air conditioning problem. The compressor had no power due to a faulty high-pressure switch.
Our mobile mechanic found the fault and replaced the switch. As a result, the compressor could operate again, restoring the vehicle’s air conditioning.
Kia Air Conditioning Not Working in Morley
The Kia had an air conditioning fault that stopped the compressor from working.
When the compressor fails to operate, the system cannot cool the cabin as intended.
However, a compressor that does not switch on is not always faulty.
In some cases, an electrical fault stops power from reaching the compressor.
For example, a faulty pressure switch can prevent the system from turning on.
Our mobile mechanic checked the Kia in Morley and found the high-pressure switch was causing the problem.
Therefore, replacing the switch was the correct repair rather than replacing the compressor.
What Does an Air Conditioning High-Pressure Switch Do?
The high-pressure switch helps protect the vehicle’s air conditioning system.
It monitors pressure conditions within the refrigerant circuit.
If pressure rises beyond a safe limit, the switch can stop compressor operation.
This helps protect the compressor and other air conditioning parts.
However, a faulty switch may also prevent the compressor from running when system pressure is safe.
As a result, the air conditioning may stop blowing cold air.
Some vehicles use a pressure sensor instead of a simple switch. The control system then uses the sensor signal to manage compressor operation.
Therefore, technicians must check the type of system before testing or replacing parts.
Why the Kia Air Conditioning Compressor Had No Power
The Kia’s air conditioning compressor was not receiving the power it needed to operate.
At first, this may appear to be a compressor problem.
However, the fault can come from another part of the electrical system.
Common causes of compressor power loss include:
- Faulty air conditioning pressure switches.
- Blown fuses.
- Damaged wiring or loose plugs.
- Faulty compressor relays.
- Poor electrical connections.
- Faults within the air conditioning control system.
In this case, the high-pressure switch caused the problem.
Our mobile mechanic found the fault and replaced the switch.
As a result, the compressor could operate again.
Finding the Cause of a Car Air Conditioning Electrical Fault
Correct fault finding is important when dealing with air conditioning electrical problems.
First, a technician checks the symptoms and works out why the compressor will not operate.
Next, they inspect the parts that control compressor power.
Depending on the vehicle, this may include checking fuses, relays, wiring and pressure switch signals.
Electrical testing can help find the cause without replacing parts that still work.
For example, a compressor may be in good condition but receive no power due to a faulty switch.
In this situation, replacing the compressor would not fix the problem.
Therefore, proper testing can save customers time and money.
Replacing the Faulty Kia High-Pressure Switch
Once we found the faulty high-pressure switch, CMM Automotive replaced it.
The switch forms part of the air conditioning control system.
It helps the vehicle decide when the compressor can operate safely.
A faulty switch may send the wrong signal or prevent the control circuit from working.
Therefore, replacing the faulty part can restore normal compressor operation.
After the repair, the Kia’s compressor could operate again.
The air conditioning system then returned to working order.
This repair shows why finding the true cause matters before fitting expensive parts.
Does a Faulty Pressure Switch Mean the Aircon Needs a Regas?
Not always. A faulty pressure switch is an electrical or control fault.
A refrigerant regas will not fix a broken switch.
However, low refrigerant pressure can also prevent compressor operation on many vehicles.
This means technicians must check the system before deciding what repair it needs.
If the system has a leak, the technician must find and repair it before recharging.
On the other hand, a faulty switch may only need replacement.
Some switch designs require refrigerant recovery before removal. Others have a valve that allows replacement without opening the refrigerant circuit.
The correct method depends on the vehicle’s design.
Warning Signs of a Faulty A/C Pressure Switch
A faulty pressure switch can cause several problems.
Common warning signs include:
- Air conditioning stops blowing cold air.
- The compressor does not switch on.
- Cooling works at times but then stops.
- The air conditioning stops without warning.
- The compressor control circuit does not operate as expected.
However, other faults can cause similar symptoms.
For example, low refrigerant pressure or a faulty relay can also stop compressor operation.
Therefore, a proper inspection is important before replacing the switch.
Mobile Car Air Conditioning Repairs Perth
CMM Automotive provides mobile air conditioning repairs across Perth and nearby suburbs.
We help drivers with many common air conditioning faults.
Our services include:
- Air conditioning electrical fault checks.
- Compressor power supply faults.
- Pressure switch and sensor faults.
- Air conditioning compressor repairs.
- Refrigerant leak testing.
- Air conditioning servicing and regassing.
- R134a and R1234yf air conditioning systems.
Our mobile service allows us to inspect and repair many faults at your home or workplace.
In addition, we aim to find the cause before recommending new parts.
For more details, visit our mobile car air conditioning Perth service page.
Frequently Asked Questions
Can a faulty pressure switch stop the A/C compressor?
Yes. A faulty pressure switch can stop the compressor from operating, even when the compressor itself still works.
Will a regas fix a faulty air conditioning pressure switch?
No. A regas cannot repair a faulty switch. The technician must find and fix the control fault.
Can CMM Automotive repair Kia air conditioning faults in Morley?
Yes. CMM Automotive provides mobile air conditioning diagnosis and repairs in Morley and surrounding Perth suburbs.
Does a compressor that will not turn on always need replacement?
No. Electrical faults, pressure switch problems and low refrigerant pressure can also stop compressor operation.
Book a Car Aircon Repair Perth Service
If your vehicle’s air conditioning has stopped cooling, CMM Automotive can help.
Our car aircon repair Perth service covers electrical faults, pressure switches, compressors and refrigerant leaks.
We also provide mobile car air conditioning Perth services at suitable locations across the metropolitan area.
Contact CMM Automotive to arrange an inspection and get your air conditioning working again.
