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That moment when testing a start relay with a multimeter clicked for me
I was troubleshooting a refrigerator that ran constantly but stayed warm. My first thought was a sealed system issue, which meant a big job. On a whim, I decided to test the start relay with my multimeter set to ohms. I got a reading that showed it was completely dead, not just weak. Replacing it took two minutes, and the fridge kicked on cold immediately. I had always assumed relays either worked or didn't, but this taught me to test them first every single time. It's such a fast diagnosis that avoids so much unnecessary work. Now I explain this to customers to help them understand the fix. This little tip has made my service calls way more efficient!
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