Why You Must Address Your Faulty Expansion Valve So Your AC Won't Break Down

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Why You Must Address Your Faulty Expansion Valve So Your AC Won't Break Down

25 May 2023
 Categories: , Blog

As a homeowner, few things are more frustrating than dealing with a malfunctioning air conditioning unit during the hot summer months. One common issue that can arise with an AC system is a malfunctioning thermal expansion valve. Understanding what causes this problem and what you can do about it can help you keep your home cool and comfortable all year.

The Causes of a Malfunctioning Thermal Expansion Valve

A few potential culprits exist when you have a malfunctioning thermal expansion valve. One common cause is a buildup of debris or dirt within the valve, preventing the valve from opening and closing correctly and disrupting the refrigerant flow through the system. An expansion valve's tiny diameter means it may also experience restrictions. 

The Solenoid Valve Might Be Stuck

Another potential issue is a malfunctioning solenoid valve, which can cause the valve to get stuck in an open or closed position, resulting from the system having excessive pressure. The solenoid valve controls the refrigerant flow in the system, and an electric current controls it.

When the solenoid valve becomes stuck in an open or closed position, it can prevent the system from functioning correctly, causing the AC to overheat in addition to causing the solenoid valve to malfunction.

You Might Have a Faulty Temperature Sensor

A faulty temperature sensor can also cause problems with the valve's functionality. The sensor might be defective simply because it has worn out over time, which will also affect the thermal expansion valve.

Fix your Thermal Expansion Valve as Soon as Possible

Taking action is crucial if you suspect your thermal expansion valve is malfunctioning. Ignoring the problem can lead to decreased energy efficiency, reduced cooling performance, and potentially even damage to other components within your AC system. The first step in addressing the issue is to call a professional AC technician. They can diagnose the problem and recommend the best course of action.

How the Technician Will Rescue Your AC

Sometimes, you may need a simple valve cleaning or replacement of a faulty solenoid valve or temperature sensor to get your AC system back up and running. In more severe cases, however, you may need to replace the entire valve to restore proper functionality.

A malfunctioning thermal expansion valve can be a frustrating problem, but it's crucial to take action as soon as possible to avoid further complications. By working with a local HVAC technician for AC repairs and taking steps to keep your AC system clean and well-maintained, you can keep your home cool and comfortable all summer long.