AC running but not cooling
The AC runs but the air is warm, or the house won't cool down.
What you're probably seeing
The AC runs but the air is warm, or the house won't cool down.
Likely causes
- A clogged filter or dirty outdoor coil.
- Low refrigerant.
- A failed capacitor or fan motor.
Safe checks you can do now
- Replace the filter.
- Check the outdoor unit is running and clear of debris.
- Turn it off if lines are iced over.
When to call a pro
It's still warm after a new filter, or the outdoor unit isn't running.
General information about common causes, not a diagnosis of your home.
FAQ
Quick answers
Who fixes ac running but not cooling?
A heating and cooling company. Call (844) 511-3573 to connect with an independent local heating and cooling company.
How much does it typically cost?
AC repair: $150–$650 (HomeGuide 2026 national ranges). Your pro sets the real number after seeing the job.
When should I call?
It's still warm after a new filter, or the outdoor unit isn't running.
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