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AC Repair
Why Does My AC Freeze Up? 5 Common Causes in LA Homes
Ice on the indoor coil isn't normal, here's what's causing it and what to do before you call.
March 2, 2026 4 min read
Top 5 causes
1) Dirty filter restricting airflow. 2) Low refrigerant from a slow leak. 3) Failing blower motor or capacitor. 4) Closed or blocked supply registers. 5) Outdoor temperatures below 60°F running the AC at night.
What to do right now
Turn the system OFF (cooling mode). Switch the thermostat to FAN ONLY for 1-2 hours to thaw the coil. Replace the filter. If it freezes again within 24 hours, call us, it's almost certainly refrigerant or airflow related and not a DIY fix.