My understanding and experience with the door actuators is they fail to move in high heat. No problem in winter, not hit summer days with sun beating down in the door.
Even when they fail, the key still works, so never a worry of stranding.
I’m thinking on the CV’s I want to have them rebuilt instead of buying new. Supposed to be a great shop in the Denver area that does rebuilds.
If yours are OEM, you can buy a kit that's just the outers for lots less than the full axle. Requires that you do all the labor of the rebuild, but you get to keep everything OEM. It's generally the outers that wear out anyway. Boot kits are also available (can't remember if that's included with the outer kit).