Analyzing Problems Using Pressure Gauges in Automotive Air Conditioning Systems
Nowadays, air conditioning systems—commonly referred to as “car air conditioners”—are an essential component in every vehicle, regardless of type. They play a crucial role in ensuring passenger comfort inside the cabin.
The primary functions of an automotive air conditioning system include controlling temperature, humidity, airflow, and air quality, creating a pleasant environment for passengers.
DENSO is a leading global manufacturer of high-quality automotive parts, known for reliability and innovation. Their product range includes common rail systems (diesel engines), electrical components such as alternators and starters, and automotive air conditioning systems. Many major car manufacturers rely on DENSO air conditioning systems, making it one of the most trusted brands worldwide.
Main Components of an Automotive Air Conditioning System
Compressor – Compresses and circulates refrigerant gas.
Condenser – Releases heat and converts refrigerant from gas to liquid.
Expansion Valve – Reduces pressure and controls refrigerant flow.
Evaporator – Absorbs heat from the cabin and cools the air.
The system uses refrigerant as a heat exchange medium, which circulates between gaseous and liquid states to regulate cabin temperature.
Over time—typically after 5 to 10 years of use—air conditioning systems may deteriorate due to wear and tear. Common problems include:
Air conditioner not cooling
Weak or insufficient cooling
Unpleasant odors
No airflow from vents
To diagnose these issues accurately, professional technicians at DENSO-certified service centers use pressure gauge analysis to measure system performance and identify faults.
Pressure Gauge Analysis for Troubleshooting
When abnormal conditions occur, technicians analyze high-side and low-side pressure readings under specific test conditions. These readings help determine:
Refrigerant level
Compressor efficiency
Blockages or leaks
Expansion valve performance
Based on the diagnosis, appropriate corrective actions are taken using genuine DENSO parts, ensuring optimal performance and extended system life.
