4-Way Valve Stuck — Hot gas not directed properly

What does 4-Way Valve Stuck mean?

The 4-way valve is responsible for directing hot gas. If it fails to shift correctly, temperature sensors will detect a problem and trigger an error code.

• Debris lodged inside the valve body.
• Failure of the electrical solenoid preventing the valve from shifting.
• Incorrect refrigerant charge.
• Other operating parameters not being met.

Click steps to track your progress.

1. 1

   Check for correct refrigerant charge and that all other operating parameters are met.

2. 2

   In heating mode, check for line voltage to the solenoid coil after the time delay.

3. 3

   If voltage is present but the valve doesn't shift, unplug the valve from the PCB.

4. 4

   Use an ohmmeter to check the solenoid coil for continuity. If resistance is out of spec, replace the coil.

5. 5

   Use a strong magnet along the valve body to check if the piston is stuck. If stuck, the valve must be replaced.