Clicking that repeats but never starts the unit can be a bad relay, capacitor, or thermostat issue

https://actroubleshooting315.yousher.com/why-a-reliable-ac-company-matters-in-winter-haven-ac-emergencies

Clicking that repeats but never starts the unit can be a bad relay, capacitor, or thermostat issue. Check settings, then schedule diagnosis if the AC does not engage.