Rick's Free Auto Repair Advice

Posts Tagged: thermal expansion valve

What is an automotive expansion valve

How does a automotive thermal expansion valve work? Let’s keep this simple; all you’re trying to do in an auto AC system is regulate the flow of high pressure liquid refrigerant though a small opening, so it can flow into the evaporator. You want the liquid to absorb heat from the cabin and cause the liquid to boil and change into a gas. Once the refrigerant has turned into a gas, you want it to stop absorbing heat and immediately leave the evaporator. If the system is low on charge, … Read More

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