It’s been super hot this summer, and that means your AC is cycling on and off all day—aka putting a ton of strain on one of the most common failure points: the capacitor. In this video I show you how I diagnosed my own unit when the thermostat said it was on, but the vents were blowing warm air. Outside, I could hear the compressor buzzing, but the fan wasn’t spinning, which is a big clue on a dual run capacitor (it powers the fan and the compressor). I also break down the three common “bad capacitor” scenarios: fan runs but compressor doesn’t, compressor runs but fan doesn’t, or neither one runs. I walk you through doing this safely—killing power at the disconnect, pulling the service panel, and discharging the capacitor with an insulated screwdriver before you touch anything. Then I show you how to identify the right replacement by reading the label (mine was a 45/5 dual run with a 6% tolerance), plus how to test it with a meter. The whole point is saving money: instead of paying $300–$400 (or way more after hours), you can usually fix this yourself with a $10–$40 part. And if your label is worn off, I show you how to look it up by model number so you can order the right one.