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AC Not Blowing Cold Air? What to Check and When to Call
Family-owned
24/7 Emergency Repairs
Licensed · CAC1821751
Quick answer
If your AC is running but not blowing cold air, check that the thermostat is set to Cool and below the room temperature, replace the air filter, make sure the breakers for the indoor and outdoor units are on and the outdoor unit is running, and look for ice on the copper lines. If the outdoor unit is not running, the lines are frozen, or the air is still warm after these checks, turn the system off and call a technician; those point to problems like a failed capacitor, a refrigerant leak or a frozen coil.
Need help now? Call Blue Air Heating and Cooling at (407) 300-4185, available 24/7 for emergency repairs, or schedule service online.
Safe checks you can do first
- Thermostat. Set it to Cool, set the temperature a few degrees below the room, and replace the batteries if the screen is blank or dim.
- Air filter. A clogged filter chokes airflow and can freeze the indoor coil. Replace it if you cannot see light through it.
- Breakers. Check the breakers for both the indoor unit and the outdoor unit. If a breaker trips again after you reset it, leave it off and call.
- Outdoor unit. With the system calling for cooling, the outdoor fan should be spinning. Clear leaves, grass and anything stacked against it.
- Vents and returns. Open supply vents and make sure nothing blocks the return grilles.
- Ice. Look at the copper lines at the outdoor unit and, if you can see it, the indoor coil. Ice means turn the system off and call.
Signs it needs a technician
- The outdoor unit hums or clicks but the fan does not spin.
- Ice on the copper lines or the indoor unit.
- A breaker that trips again after a reset.
- Water around the indoor unit, or the system shuts itself off (see clogged AC drain line).
- Burning or electrical smells, or loud grinding or squealing.
- Warm air after you have replaced the filter and checked the thermostat and breakers.
Why you should not add refrigerant yourself
An air conditioner does not use up refrigerant. If it is low, it is leaking, and the leak needs to be found and repaired. Federal rules require EPA Section 608 certification to handle refrigerant, so recharging is a job for a licensed technician.
What a technician checks
On a no-cooling call, a technician checks the electrical parts that start the system (such as the capacitor and contactor), the refrigerant pressures, the indoor and outdoor coils, the airflow and the drain. If your AC runs and blows cool air but the house still will not cool down, read why your home feels hot with the AC running.
Blue Air Heating and Cooling repairs all makes and models of central air conditioners, heat pumps and ductless mini-splits across Orlando and Central Florida. See AC repair service.
Frequently asked questions
Why is my AC running but blowing warm air?
The most common causes are a dirty filter, a thermostat set wrong, a tripped breaker for the outdoor unit, a failed capacitor, a frozen coil or a refrigerant leak. Check the filter, thermostat and breakers first; if the air is still warm, call a technician.
Why is my outdoor AC unit not running?
Check the thermostat and the outdoor breaker. If the unit hums or clicks but the fan does not spin, a failed capacitor or contactor is a common cause, and both need a technician because the parts store electrical charge.
Can a dirty filter make my AC blow warm air?
Yes. A clogged filter cuts airflow across the indoor coil, which can make the coil freeze and stop cooling. Replace the filter and let any ice melt with the system off before running it again.
Should I turn my AC off if it is not blowing cold air?
If you see ice, smell burning, or the outdoor unit is not running, yes: turn it off at the thermostat and call for service.
Does Blue Air offer emergency AC repair?
Yes. Blue Air Heating and Cooling is available 24/7 for emergency repairs at (407) 300-4185.
Ready to get it fixed? Call Blue Air Heating and Cooling at (407) 300-4185, available 24/7 for emergency repairs, or schedule service online.
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At Blue Air Heating and Cooling, we believe that comfort should never be compromised. Our dedicated team is committed to providing you with exceptional service, ensuring your home remains a sanctuary regardless of the season. With our extensive experience and expertise, we tackle every HVAC challenge with precision and care. Whether it's a routine maintenance check or an emergency repair, we are just a call away, ready to restore your comfort. Experience the difference with Blue Air – where your satisfaction is our priority.
