Key points covered:

• Understanding TXV operation: opening vs closing forces
• Why a failed closed TXV always causes high superheat
• How to interpret superheat, subcool, and temperature split readings
• The importance of checking airflow before replacing components
• A practical test to distinguish airflow problems from TXV failure
• How to verify your diagnosis using heat mode operation
• The “bulb removal test” to check TXV mechanical function

Whether you’re a seasoned tech or new to the field, this video will help you avoid misdiagnosis and unnecessary parts replacement. We walk through the complete diagnostic process step-by-step with real-world examples.