What happens when an AC expansion valve fails?
What happens when an AC expansion valve fails? AC compressor constantly running. If the AC expansion valve fails or sticks open, it will cause the compressor to pump refrigerant through the vehicle’s AC system, even when it may be undesirable for it to do so. This will put an additional strain on the compressor and associated AC components, making them more susceptible to premature failure. Can a bad or failing expansion valve cause unmetered refrigerant? Frost on AC evaporator or coming from the vents. Another symptom of a potential problem with the vehicle’s AC expansion valve or orifice tube is...