How To Diagnose A BAD Compressor | HVAC Troubleshooting

After fifteen years crawling through attics and squeezing into mechanical rooms, I’ve learned that cheap safety glasses will fog up, fall off, or crack when you need them most. The Klein Tools 60171 changed that for me. These semi-frame glasses stay put whether I’m flat on my back under a furnace or leaning into a rooftop unit in July heat. The clear lens gives me actual visibility-no distortion, no constant readjusting. At this price point for a 2-pack, I keep one pair in my truck and one in my tool bag. They’re not fancy, but they’re built by people who understand what HVAC work demands. I’ve had the same pair survive six months of daily abuse, which in this trade, says everything you need to know.