Dodge Ram A/C Expansion Valves & Orifice Tubes

Most A/C systems found on modern vehicles fall into two types depending on their structure – a Thermostatic Expansion Valve and a fixed orifice tube system. Both orifice tube and expansion valve separate the high and low sides of the A/C system, thus controlling the liquid refrigerant flow through the evaporator. The orifice tube is usually a fixed piece which measures the flow and induces the compressor to adjust the capacity of the pump or switch it on and off, while the expansion valve adjusts pressure with the help of a sensor which monitors the refrigerant temperature.

A failing orifice tube or expansion valve can cause problems with the A/C system performance. If you have noticed that your Dodge Ram’s A/C system is blowing warm air or there is frost coming from the vents, have your A/C system checked as these symptoms alert you of a failing orifice tube or expansion valve. If that is the case, browse our virtual shelves stocked with Dodge Ram A/C expansion valves and orifice tubes by ACDelco, Four Seasons, FJC, and Denso, brands that guarantee premium quality of their products. Here you'll find the finest replacement parts on the market.