When it comes to automotive AC parts, the expansion valve and the orifice tube are two critical components that regulate refrigerant flow in your car’s air conditioning system. While both serve the same purpose, they function differently and are used in different vehicle AC designs.

Expansion Valve

The expansion valve is a precision component that adjusts the refrigerant flow based on the cooling demand. It uses a sensor to detect temperature and pressure, ensuring efficient cooling. Most modern cars, especially those with variable cooling needs, use expansion valves for better temperature control.

Orifice Tube

An orifice tube is a fixed restriction device that regulates refrigerant flow at a constant rate. Unlike the expansion valve, it does not adjust based on demand. Orifice tubes are commonly found in older or more cost-effective vehicle AC systems.

Which One Does Your Car Have?

To determine whether your car has an expansion valve or an orifice tube, check your vehicle’s AC system specifications. Generally:

• Vehicles with manual AC systems often use an orifice tube.

• Vehicles with automatic climate control typically use an expansion valve.

Both components are essential automotive AC parts, and choosing the right one ensures optimal performance and efficiency. If you’re unsure, consult your vehicle’s manual or a professional AC technician.