Question About Hard Start Kits

https://brooksgaci427.yousher.com/heat-safety-steps-while-waiting-on-ac-repair-from-comfort-experts-in-a-north-fort-worth-heat-wave

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