Having older cars as daily drivers means that some things don't always get fixed right away if they can be deferred. Let me give an example.   My little red sedan Ash has oddly operating heater controls. I need to press the heat button to get air to blow on the windshield. Also since the ac compressor is also used as a dehumidifier, it will engage when the heater is on and it is humid. The belt makes a high pitch screeching sound that can be heard for blocks. It startles pedestrians sometimes.