Why Is My AC Blowing Warm Air?
Warm air from the vents on a hot San Angelo afternoon is frustrating. The problem usually falls into a few categories, and some are safe to check before calling for service.
Common Causes
- The thermostat is set to heat or fan-only instead of cool.
- A dirty air filter is blocking airflow.
- The outdoor unit lost power or a component failed.
- Refrigerant is low due to a leak.
- Ductwork is leaking or disconnected.
Safe Checks
Confirm the thermostat is set to cool and the set point is below the room temperature. Check and replace the air filter if it is dirty. Make sure the outdoor unit has power and nothing is blocking airflow around it. See our AC blowing warm air page.
When It Needs a Pro
If those checks do not help, the cause may be refrigerant, an electrical component, or the compressor. Request service rather than opening the equipment yourself.
FAQs
Why is my AC blowing warm air?
Check the thermostat setting and filter first. If those are fine, the cause may be low refrigerant, a failed outdoor component, or a duct issue.
Related HVAC Pages
Need HVAC Help?
Call 325-939-8533 or get a free quote. San Angelo HVAC Pros helps San Angelo area property owners with HVAC service.