Question About Hard Start Kits

https://telegra.ph/Smart-Thermostat-Setup-Tips-From-Comfort-Experts-to-Reduce-AC-Repair-in-North-Fort-Worth-Homes-11-05

Question About Hard Start Kits Has anyone added a hard start kit to an older compressor? Ours grunts for a second before it kicks on, and the lights dim. The article mentioned it can help sometimes but won't solve a failing compressor