Q: We’ve been in a heatwave, so we’ve had the AC on. When I went outside earlier, I noticed that the outside AC unit wasn’t running. Why is my outside AC unit not turning on? A: During the hot summer ...

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We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Thom Dunn Thom Dunn is a writer focusing on home heating and cooling. He once ...