Unlocking the Secrets of HVAC Valves Using a Magnet
17 Mar 2025 · 1 min

0:31
Short YouTube transcript excerpt describing a practical diagnostic demonstration: Mel uses a strong magnet to determine an HVAC valve's position and whether the system is in heating or cooling mode by seeing where the magnet sticks. The speaker praises the clarity and usefulness of Mel’s step-by-step demonstration.










