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Why is my AC blowing warm air?
Short answer
Check the thermostat is on Cool, the filter is clean, the breaker hasn’t tripped and the outdoor unit is running. If those are fine, it may be low refrigerant or a failed part; call a tech.
See every step in 1 minuteThe AC or heat stopped working: what to check and when to call
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Official sources
- Energy Saver (U.S. Dept. of Energy)energy.gov
- CDC: carbon monoxide safetycdc.gov
- Ready.gov: extreme heat and winter weatherready.gov