If you notice that your AC system is not performing to your expectations, check if your a/c expansion valve is functioning well as that might be the culprit. The a/c expansion valve is responsible for dictating the amount of flow of refrigerant into the evaporator. If it fails, the AC in your car will not work properly. Read on to find out more about having a bad expansion valve in your Ferrari 430.
What Does the Expansion Valve Do?
The a/c expansion valve controls the flow of refrigerant into the evaporator. It maintains the pressure in the system and prevents over-expansion by opening to allow more expansion or closing if there isn’t any expansion occurring.
AC Compressor is Running Constantly
A common symptom of a bad expansion valve is that the compressor will be running constantly. This might be due to low refrigerant levels in the car, putting an extra strain on the compressor. Look for a leaking valve as it also does not allow refrigerant to enter the evaporator properly.
Badly Performing AC System
A badly performing AC system is usually caused by a faulty expansion valve. A faulty expansion valve will start leaking freon into the atmosphere. This would result in less freon in the evaporating inlet and there causing the ac to overheat and perform poorly.
Frost on the Orifice Tube and Vehicle’s AC Vents
A bad expansion valve will cause the expansion tube to frost over. The refrigerant will overflow and mix with the compressor oil if the valve is not working properly. Frost is then formed when the mixture accumulates on the expansion orifice tube. If you notice frost on your expansion tube, it is important to get your valve fixed immediately to avoid further damage.
Inconsistent Air Flow
Inconsistent airflow is a result of a faulty expansion valve. Look out for a ‘chugging’ sound as the rev drops then rises again. If you hear such a sound, it is a good indicator that your expansion valve has failed.
AC System is Blowing Warm Instead of Cold Air
One of the most common expansion valve failure symptoms is that your car will only blow warm air. A variety of issues might be the cause, including a leaking valve or low refrigerant levels. You will immediately notice if your system’s operating pressure is below normal gauge readings. Make sure to check with the mechanic immediately if you notice low refrigerant levels. It usually can be fixed by adding more freon into the system or replacing it entirely.
The expansion valve plays an important role in cooling down the air in your car. If you are experiencing any problems with your expansion valve, it might be due to one or more of the reasons mentioned above. You should first consult with a mechanic as replacing it will not always be the solution. If finance is not an issue, you can also consider having your valve professionally serviced by an auto part store for an easy and hassle-free process.