Nothing worse than hot air coming from your AC in Texas summer. Here are the most common causes and what to do about them.
You walk inside expecting cool relief, but your AC is blowing hot air. In North Texas summer heat, this isn’t just annoying—it’s a crisis.
1. Thermostat Is Set to “Heat” or “On”
- Check your thermostat is set to “COOL” not “HEAT”
- Make sure fan setting is “AUTO” not “ON”
2. Dirty Air Filter
A clogged filter is the #1 cause of AC problems. When airflow is restricted:
- Indoor coil freezes up from lack of airflow
3. Refrigerant Leak
Your AC needs proper refrigerant levels to cool. Signs of a leak:
- Ice buildup on refrigerant lines
- AC runs constantly but never cools
4. Outdoor Unit Not Running
- Breaker hasn’t tripped (check electrical panel)
- Outdoor disconnect switch is ON
5. Frozen Evaporator Coil
- Turn off AC at thermostat and turn fan to “ON” to melt ice.
6. Dirty Condenser Coils
- Heat can’t escape properly, causing system to work harder.
7. Compressor Problems
- Outdoor unit is loud or making grinding noises.
- Circuit breaker trips repeatedly.
Disclaimer: This article is for informational purposes only. For professional advice, please contact a licensed HVAC contractor.