What extreme heat does to your system
An air conditioner moves heat from inside your house to the air outside. The hotter the outdoor air, the harder that job gets, because the outdoor coil has to shed heat into air that is already very hot.
Refrigerant pressures rise, the compressor works harder, and the electrical parts run hot. A system that cools easily at 90 degrees can struggle at 108.
That is why a few parts fail again and again in Bakersfield: capacitors, which give motors their starting push and weaken with heat, contactors, which carry heavy current and wear, condenser fan motors, which run for hours at a time, and eventually compressors.
A coil coated in dust or cottonwood makes every one of those problems worse, because it cannot shed heat.
Homes add to the load. Many Bakersfield houses have ducts in attics that can be far hotter than the air outside, and two story homes have the added challenge of cooling an upstairs that sits right under that attic.
If one part of the house never cools, equipment size and duct condition are the first things to check.