Posts Tagged: AC orifice tube

Understanding the Function of an Orifice Tube

Auto AC Orifice Tube Operation Some car makers use AC orifice tube systems in their AC. An orifice tube is simply a refrigerant metering device to control the rate of flow of refrigerant into the evaporator located in your dash. In the illustration below, you’ll see that low pressure gas flows out of the evaporator coil and into the accumulator. A low-pressure switch is often located right on the accumulator or in the low-pressure line before the compressor. The low-pressure switch is used to control when the compressor clutch engages … Read More