Question About Hard Start Kits

https://erickefjv629.moderncairn.com/posts/comfort-experts-explains-capacitor-and-contactor-failures-in-north-fort-worth-ac-repair-3

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