VAV Box Troubleshooting

🔧 VAV Box Troubleshooting Guide | Common Faults & How to Fix Them In this video, we break down the most common issues found in VAV (Variable Air Volume) boxes and show you how to troubleshoot them step by step in real field conditions. Whether you’re an HVAC technician, controls engineer, or working with building automation systems (BAS), this guide will help you quickly identify problems and apply the right fixes. ⸻ 📌 What you’ll learn: • How a VAV box works (quick overview) • Common faults and symptoms in the field • How to diagnose issues using BAS and field tools • Step-by-step troubleshooting process • Pro tips to avoid misdiagnosis ⸻ ⚠️ Common problems covered: • Stuck or non-responsive damper • Airflow sensor (CFM) inaccuracies • Actuator failures • Communication loss (BACnet/Modbus) • Temperature sensor drift • Reheat coil not working • 24V power issues • Control loop instability (hunting) ⸻ 🛠 Tools used in troubleshooting: • Multimeter • Airflow hood • BAS interface (graphics & trends) • Basic hand tools ⸻ 💡 Pro Tip: Most VAV issues are not equipment failures — they’re control, calibration, or communication problems. ⸻ 📲 Need help with remote troubleshooting? Visit: www.controlfieldpro.com ⸻ 👍 Like, comment, and subscribe for more HVAC & Controls content. ⸻ 🔎 Tags: HVAC, VAV box, troubleshooting, building automation, BAS, controls engineering, airflow, actuator, BACnet, HVAC technician, PLC, commissioning, TAB, HVAC diagnostics