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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 ...

We did a piece on possible reasons why your window air conditioner isn't cooling, now it's time for central air conditioners. When your AC runs but the house stays hot, the first thing to check is ...