Why does my car AC make a hissing noise?
If the AC system is pumping out cold air and you hear AC hissing noise, don’t worry, everything is working as planned. However, if the AC system isn’t cooling properly and you hear a hissing sound, you may have an obstruction in the metering device. See this post for more information on what causes obstructions.
What should I do if I hear a hissing sound in my AC?
If you hear any of these sounds immediately shut down the AC and call your local HVAC technician without wasting any time. Since the compressor is the most expensive component of your AC, it would be foolhardy to let this matter slide.
Why does my expansion valve make a hissing sound?
If that is the case, the hissing sound will be short and small. It is very normal for the expansion valve to make this kind of noise. When the refrigerant gas present in the valve expands, it makes the hissing sound. Nothing to worry about here.
How does an AC system in a car work?
Car AC systems work by pressurizing liquid refrigerant and then releasing through a very small opening. Depending on the type of system used by the carmaker the metering device can be an orifice tube usually located in the engine compartment or an expansion valve often located in the cabin area.
What does that hissing noise from my AC mean?
The compressor hissing or shrieking is a serious situation: it means the pressure inside the compressor is too high. If you hear hissing, or worse, shrieking, coming from your compressor, turn off your air conditioner immediately and call a technician; do not restart your air conditioner until it has been looked at by a professional.
Why does my car make a hissing noise?
Depending on the type of system used by the carmaker the metering device can be an orifice tube usually located in the engine compartment or an expansion valve often located in the cabin area. As they release the high-pressure refrigerant they make a slight AC hissing noise, similar to the noise you hear when you depress the nozzle on a spray can.
If that is the case, the hissing sound will be short and small. It is very normal for the expansion valve to make this kind of noise. When the refrigerant gas present in the valve expands, it makes the hissing sound. Nothing to worry about here.
Car AC systems work by pressurizing liquid refrigerant and then releasing through a very small opening. Depending on the type of system used by the carmaker the metering device can be an orifice tube usually located in the engine compartment or an expansion valve often located in the cabin area.