Why Your AC is Blowing Warm Air & What to Do About It

May 27, 2025
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When the summer heat hits hard, your air conditioner is supposed to be your best friend. But what happens when it starts blowing warm air instead of cool comfort? It’s a common issue—and one that can usually be resolved quickly with the right know-how.

Let’s break down the top reasons your air conditioner isn’t cooling and what you should do next.

Top Reasons Your AC is Blowing Warm Air

1. Thermostat Settings Are Incorrect

Start simple. Make sure your thermostat is set to “cool” and not “fan” or “heat.” Set the fan to “auto” so the unit only blows air when it’s actively cooling.

2. Dirty Air Filter

A clogged filter restricts airflow and can cause your system to overheat or freeze up. Replace filters every 1–3 months for optimal performance.

3. Low Refrigerant Levels

If refrigerant is low due to a leak, your system can’t cool properly. This is a job for a licensed HVAC technician—don’t try to DIY it.

4. Frozen Evaporator Coils

Frozen coils prevent your system from absorbing heat from your home. This could be caused by low refrigerant, poor airflow, or dirty filters.

5. Dirty or Blocked Condenser Unit

The outdoor unit needs clear space to release heat. Clean away dirt, leaves, and debris to keep air flowing freely.

6. Electrical Issues

A tripped breaker or blown fuse can shut off your cooling components, leaving the fan to run with no cold air. If this happens repeatedly, call in a pro.

7. Leaky or Damaged Ducts

Air leaks in your ductwork can cause cool air to escape before it reaches your living space, making it feel like your AC isn’t working.

What You Can Do About It

Before calling in the pros, try these quick fixes:

  • Check and reset thermostat settings

  • Replace or clean your air filter

  • Clear debris from around your outdoor unit

  • Ensure all supply and return vents are open and unobstructed

Still Blowing Warm Air? Call Dash Heating and Air Conditioning!

If your AC is still not cooling properly, don’t sweat it. The experts at Dash Heating and Air Conditioning are here to help. We’ll inspect your system, pinpoint the problem, and get your home feeling cool and comfortable again—fast.

📞 Call Now: (435) 677-7709

Get expert AC repair from the team you can trust—Dash Heating and Air Conditioning.

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