Expert: Don't wait until AC unit breaks

Air conditioning maintenance companies have been booked ever since the temperatures spiked, but there are several things residents can do to keep an AC unit from needing a fix. "I mean, you gotta be, like I say, you gotta have a Ph.D. in engineering just to use your thermostat," said Alvin Plantinga, whose air conditioning unit stopped working. "And that seems over the top to me."