Symptoms of a failing Expansion Valve

Air conditioning is warm

Air conditioning systems seem like the greatest invention in the world, until they stop working. Then they kind of suck, right? This might happen if your expansion valve is acting up. When the expansion valve isn’t working, the flow of refrigerant will not be correctly controlled, and that can mess with the temperature of your car’s air conditioning system. Depending on the severity of the expansion valve problem, you might not have warm air. You might just have cold air that isn’t as satisfactory as you would like. Kind of like when you order an ice-cold drink, and it comes out room temp.

Frost on the Expansion Valve

A busted expansion valve may limit the amount of refrigerant entering the system and cause frost to build-up on the valve. Freezing may be great for a Tahoe vacation in December, but it’s not so hot in your air conditioning system. If you notice some frost on the expansion valve, then you've got a problem.