What make/model?
One of the things that happened to me... Suddenly my Front A/C (Carrier Air V not that it matters) was tripping the 20 amp breaker... Not the thermal in the compressor but the 20 amp breaker that feeds it.
Well, I applied the old clamp on ammeter.. Yup it was drawing over 20 amps just before CLICK (breaker operating as designed).
So, next morning before the giant outdoor oven fired up I went topside and oped the covers.. Looked at the condenser (hot) coils (the inside where you can't see with the covers on) and said AH-HA.. Cleaned everything, re-covered, want back inside, pressed button, COOL.
Sadly that's not the problem with it today.. Today's problem is different.. And Tomorrow it will be fixed.. Sort of.. It will become a Coleman Mach with Carrier controls sometime Tomorrow.. That'll fix it.