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Why Is My AC Running But Not Blowing Cold Air?

Your AC can run but stop cooling due to a dirty filter, low refrigerant, a dirty outdoor coil, wrong thermostat mode, a tripped outdoor breaker, or a failed blower/capacitor. Sierra offers same-day service and 24/7 emergency help, and we stock parts to complete 93% of repairs on the spot.

Quick checks:

  • Set thermostat to Cool and fan to Auto.
  • Replace or clean the air filter.
  • Clear debris around the outdoor unit.
  • Verify the outdoor disconnect/breaker is on.


Updated: 2025-12-24 00:00:00



Need help in Las Vegas, NV? Call (702) 710-9106 or book online.

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