Diagnostics
2026-04-21
📖 10 min read
TXV Troubleshooting — Stuck Open vs Stuck Closed Symptoms & Diagnosis
The TXV is one of the most misdiagnosed components in HVAC. This guide covers the three failure modes — stuck open, stuck closed, and hunting — with the exact pressure readings and symptoms you'll see in the field.
TXV
expansion valve
troubleshooting
refrigerant
cooling