Car air conditioning Perth services from CMM Automotive help drivers find and fix faulty cooling systems. Recently, we attended a Kia in Woodvale with an oil leak around its high-pressure air conditioning hose.
Our mobile mechanic found the leaking hose and replaced it onsite. This repair shows why oily marks around air conditioning parts should never go unchecked.
Kia Air Conditioning Hose Leak in Woodvale
The Kia had developed a leak around its high-pressure air conditioning hose.
During our inspection, we found oil leaking from the hose.
Air conditioning systems use special oil to help lubricate the compressor. This oil moves around the system with the refrigerant.
Therefore, oily marks around a hose can indicate a refrigerant leak.
However, technicians must check the source of the oil before deciding which part needs repair.
In this case, we found the faulty hose and replaced it at the vehicle’s location in Woodvale.

Why Do Car Air Conditioning Hoses Leak?
Air conditioning hoses carry refrigerant between different parts of the cooling system.
During normal use, these hoses face heat, pressure and engine vibration.
Over time, wear or damage can cause leaks.
Common causes include:
- Worn rubber hose sections.
- Damaged hose fittings.
- Loose or faulty connections.
- Cracks caused by age.
- Heat and engine vibration.
- Damage from nearby parts.
In addition, a hose may develop a leak where the rubber joins a metal fitting.
Even a small leak can allow refrigerant and oil to escape.
As a result, the system may slowly lose cooling power.
Why Oil Around an A/C Hose Can Indicate a Leak
Many drivers do not realise that air conditioning systems contain oil.
The compressor needs this oil to help protect its moving parts.
The refrigerant carries some of the oil through the system during normal use.
However, when a hose leaks, oil may escape with the refrigerant.
This can leave oily marks around the damaged area.
For example, a leaking hose fitting may collect dirt and form a greasy patch.
Therefore, oily marks can help technicians locate a possible leak.
However, oil alone does not prove that refrigerant is escaping. A technician must confirm the fault.
Replacing the Kia High-Pressure Air Conditioning Hose
After finding the leaking hose, CMM Automotive replaced the faulty part onsite.
High-pressure hoses form an important part of the air conditioning circuit.
They must handle normal system pressure while keeping the refrigerant sealed inside.
First, technicians must make the system safe before opening the refrigerant circuit.
Next, they remove the faulty hose and fit the correct replacement.
They must also check the fittings and seals to help prevent future leaks.
In addition, correct hose routing helps avoid rubbing against nearby engine parts.
By replacing the damaged hose, we addressed the source of the leak on this Kia.
Car Aircon Not Cold – Could a Leaking Hose Be the Cause?
If your car aircon not cold problem develops over time, a refrigerant leak may be responsible.
As refrigerant escapes, the air conditioning system can lose cooling power.
Common warning signs include:
- Warm air from the vents.
- Cooling that becomes weaker.
- Oily marks around A/C hoses.
- Air conditioning that stops cooling.
- Cooling that fails again after a regas.
- Poor cooling during hot weather.
However, other faults can also cause poor cooling.
For example, a faulty compressor or electrical problem may stop the system from working.
Therefore, finding the cause is important before adding refrigerant.
Why a Regas Alone Will Not Fix a Leaking Hose
Some drivers assume that a regas will fix any air conditioning problem.
However, adding refrigerant cannot seal a damaged hose.
If the hose continues to leak, the new refrigerant may escape again.
As a result, the cooling problem will return.
For this reason, technicians should repair the leak before recharging the system.
A proper repair may also include pressure testing, leak checks and removing air from the circuit.
The technician must then use the correct refrigerant and charge amount for the vehicle.
This helps protect the compressor and supports good cooling performance.
Car Air Conditioning Not Cold – Other Possible Causes
A leaking hose is only one reason for poor cooling.
If your car air conditioning not cold problem continues, other parts may need checking.
Common faults include:
- Low refrigerant charge.
- Faulty air conditioning compressors.
- Damaged condensers.
- Cooling fan problems.
- Faulty pressure switches.
- Electrical faults.
- Refrigerant leaks.
In addition, some vehicles develop faults that affect airflow through the cabin vents.
Therefore, a proper inspection helps find the real problem.
Replacing parts without testing can waste time and money.
Mobile Car Air Conditioning Repairs in Perth
CMM Automotive provides mobile car air conditioning repairs throughout Perth and surrounding suburbs.
We help drivers with a wide range of air conditioning faults.
Our services include:
- High-pressure A/C hose repairs.
- Refrigerant leak checks.
- Compressor repairs.
- Air conditioning regassing.
- Pressure switch faults.
- Electrical fault diagnosis.
- R134a and R1234yf servicing.
Furthermore, our mobile service allows us to complete many repairs at homes and workplaces.
This can save customers the trouble of visiting a workshop.
For more information, visit our mobile car air conditioning Perth service page.
Frequently Asked Questions
Can an air conditioning hose leak refrigerant and oil?
Yes. Refrigerant can carry compressor oil through the system. Therefore, a damaged hose may leak both refrigerant and oil.
Will a regas fix a leaking air conditioning hose?
No. A regas cannot repair a damaged hose. The leak needs repair before the system can hold its refrigerant charge.
Can CMM Automotive replace air conditioning hoses onsite?
Yes. We can replace many faulty air conditioning hoses at suitable locations throughout Perth.
Do you provide mobile air conditioning repairs in Woodvale?
Yes. CMM Automotive provides mobile air conditioning diagnosis and repairs in Woodvale and nearby Perth suburbs.
Book a Car Air Conditioning Perth Repair
If your vehicle has poor cooling or a leaking air conditioning hose, CMM Automotive can help.
Our car air conditioning Perth service focuses on finding faults and carrying out the correct repairs.
We provide mobile air conditioning checks and repairs across the Perth metropolitan area.
Contact CMM Automotive to arrange an inspection at your home or workplace.
