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Q: Help! We’ve just had our first heatwave and we want to cool the house—but our central AC is not blowing cold air. I’ve turned the thermostat on and off, but it’s still not cooling the house. Is ...

Every year when I pull my air conditioner out of storage and reinstall it, I'm worried about whether my window unit managed to survive the colder months. This year when I turned it on, I was worried ...