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Troubleshooting Low Voltage 24V Shorts and Blown Fuses

Understand how to troubleshoot the problem of a blown 24V fuse in an HVAC system. There is a specific sequence in which this should be done in order to narrow down the problem effectively and safely. Shortcuts can be used in terms of where to look but for non visible issues, technicians need to understand how to track down the problem using the electrical resistance function on a multimeter.

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Knowledge Checks

Final Exam
Diagnose blown low voltage fuse problems with the power off using the isolation method and the electrical resistance function on the multimeter!

Craig Migliaccio, Founder/Author/Trainer
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