Air conditioning outdoor unit compressor install outside the building. Reporter With a heat dome bringing record-breaking temperatures for 170 million Americans this week and most of the U.S. gearing ...

It's always in the middle of a heatwave. Your AC hums to life, but instead of the icy rush you're craving, it pushes out a faint, lukewarm breeze. That's when the dread sets in. Is the unit failing?