How do you know if your AC expansion valve is bad?
- 1) Warm Air From Vents. The most recognizable symptom of a bad A/C expansion valve is when you turn on your air conditioner and warm air starts blowing out of the vents.
- 2) Frost on the Vents.
- 3) A/C Compressor Always On.
- 4) Inconsistent Airflow.
- 5) A/C System Failure.
Keeping this in consideration, how do you check a AC expansion valve?
How to Test an AC Expansion Valve
- Make sure the AC unit is plugged in or, if it is in an automobile, turn the vehicle on.
- Use the manual to locate the thermostatic expansion valve.
- Lift the sensing bulb from the suction bulb well.
- Hold the sensing bulb in your hands for two minutes or place it in warm water.
Additionally, where is the AC expansion valve located? TXV Location The thermostatic expansion valve is usually mounted inline with the tube that supplies liquid coolant to the air conditioner evaporator. The bulb of the expansion valve is mounted to the outside of the output line of the air conditioner evaporator.
In this manner, what does expansion valve do on AC?
The expansion valve removes pressure from the liquid refrigerant to allow expansion or change of state from a liquid to a vapor in the evaporator. The high-pressure liquid refrigerant entering the expansion valve is quite warm. This may be verified by feeling the liquid line at its connection to the expansion valve.
Does the expansion valve need to be replaced?
I strongly recommend you change the expansion valve. If the clutch failed there is no reason to replace the expansion valve. If it was the bearing, then you may or may not need to replace the expansion valve, depending on whether or not metal shavings were introduced into the refrigerant system.