Last week’s heat dome pushed a lot of Chattanooga homes to their limit. Highs near 100° with almost no overnight relief exposed weaknesses that don’t always show up during normal summer days. Here are the most common complaints we heard — and what they actually meant: “My unit ran almost nonstop and my electric bill is way up.” When an air conditioner hardly ever cycles off, it’s usually fighting humidity more than temperature. Chattanooga’s high moisture levels during heat w