If an electric range or dryer is not heating, the element may not even be getting voltage. What if the element “ohms” out? If the 240v load in an appliance is not energized, sometimes just “ohming” things out doesn’t tell you what you need to know.
Please note that this guide is for qualified technicians familiar with the hazards of testing live mains circuits, and that employ adequate safety procedures. For informational purposes only. If you choose to utilize the concepts in this blog, you do so at your own risk.
Brute Force 240v Diagnostic Method
When all else fails, this sequential troubleshooting essentially “forces” the failed portion of the 240v circuit to reveal itself. This a systematic approach to finding failed components, which is an easy to follow adaptation to the well-accepted “Scientific Method”, is a more definitive method than solely “ohming” parts out. Below is the Point-to-Point™ voltage drop testing methodology for diagnosing 240v appliances when your “Subject Load” is not energized:
The above guide will provide you with a definitive way to find the “break” in the 240v circuit.
Recommended LoZ Meter
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