The Difference Between Continuity and Resistance

In this video, Roman Baugh explains the crucial difference between continuity and resistance modes on your multimeter - and why using the wrong test could lead to misdiagnosis in the field! Watch as Roman demonstrates why continuity (the "beep test") is only designed for checking circuits that SHOULD be connected, like light switches and fuses. Then learn why resistance measurement is critical for testing components like compressors and thermistors that have specific ohm ratings. Using two "dead" compressors as examples, Bert shows how one clearly fails the continuity test while the other appears good - but both are actually grounded when properly tested with resistance mode! This practical demonstration reveals why manufacturers like Copeland and Danfoss specify resistance values rather than continuity tests. What You'll Learn: The proper applications for continuity vs. resistance testing Why continuity only registers within a tiny portion of the resistance range How to properly test compressors for ground faults Understanding the ohm scale and what values mean for common HVAC components. #HVAC #HVACSchool #MultimeterTesting #HVACTips #troubleshooting Read all the tech tips, take the quizzes, and find our handy calculators at https://www.hvacrschool.com/ or the HVAC School Mobile App on the Google Play Store (https://hvacrschool.com/play-store) or App Store (https://hvacrschool.com/app-store).