Low pressure switch had a crack in it which was causing the unit to cycle and not kick in the compressor. Likely from the icing we had this year. Recommended just jumping across it due to the age of the unit and replacing it would get us close to the cost (~50%) of replacing the compressor (tearing down the unit, evacuating the coolant charge, etc.). If we get to low pressure in the compressor, the unit is shot anyway and will need to be replaced. Coolant pressure and level was fine. The cycling was starting to fry one of the contacts so replaced that as well.

Overall, happy with the outcome.

And the 28 year old Trane right next to it just kept chugging along. Tech said the unit we are having trouble with will fail before the Trane.