Long hot stretches expose faults that a mild day can hide.
We work out of Abilene, where extended hot weather keeps an air conditioner under a steady load for much of the day. A system with a low refrigerant charge, weak capacitor, failing fan motor, restricted airflow, or a dirty outdoor coil may still run, yet lose more and more cooling capacity as outdoor temperatures rise. The issue is not always that the unit has stopped; it is often that it cannot move enough heat while the heat outside stays high.
Dust on an outdoor coil makes it harder for the unit to release heat. A clogged filter restricts the air moving through the indoor side of the system. Together, those conditions lengthen run times and put added strain on the compressor and electrical components. That is why we start AC repair by checking operating conditions and airflow, rather than treating warm air or continuous running as proof that one particular part has failed.
Cooling equipment has to be assessed under the conditions it is working against. We look at the way the system is running, the airflow through it, and the components involved before recommending a repair. That separates a failed part from a unit that is running hard because it is struggling to shed heat.