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Why won't my upstairs AC unit cool?

Updated: 9/18/2023
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13y ago

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Because hot air rises. As your A/C unit kicks out cool air, that cool air makes its way downstairs, while the warm air downstairs rises to the upstairs.

You could try closing a door at the top of your stairway to prevent the downstairs warm air from making it upstairs. Or try cracking an upstairs window if it is located near the ceiling to let warm air escape outside. The brute force solution is to buy more A/C units. The most efficient solution is to spend more time downstairs than upstairs.

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13y ago
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Q: Why won't my upstairs AC unit cool?
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