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In this comprehensive guide, we break down the process of diagnosing a failed TXV (thermostatic expansion valve) in HVAC systems. Learn how to differentiate between a TXV issue and other common problems like refrigerant levels and airflow restrictions.

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.

#HVAC #TXVDiagnosis #Refrigeration #HVACTech #troubleshooting

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