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September 10, 2023
When you hear hissing sounds coming from your vehicle, you might start thinking the worst. One type of hissing coming from around your air conditioner may be a normal sound, or it could be a sign of serious trouble.
First - the normal sound. When you turn off your vehicle, the refrigerant goes from its high-pressure side to the low-pressure side. Some of those noises are normal. But when it hisses all the time, that's another story.
One cause could be that the refrigerant is leaking. Air conditioners are fairly complex systems that involve various pumps, hoses, valves and motors. When your air conditioner is cooling, the refrigerant changes from a gas to a liquid and back. That refrigerant is under pressure, and there are many places it can leak from.
A hissing sound can also be a failed valve in your air conditioner's compressor. It is what controls the refrigerant's pressurization. It's important to have this fixed fairly quickly after it develops a problem because when it isn't, that can lead to more extensive—and expensive—repairs.
If you hear screeching coming from your air conditioner at the same time you hear hissing, your compressor may be on its last legs. It could also be a defective clutch.
Any time you hear a noise you haven't routinely heard before, bring your vehicle to us so a technician can check the various components and properly repair the problems. Air conditioning systems are complex and are best handled by a professional with the right tools and equipment. When your AC has a hissy fit, let us cool it off and you at the same time.
Tuffy Tire & Auto Service Glendale Heights
1153 Bloomingdale Rd.
Glendale Heights, Illinois 60139
630-588-8846
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