Why Is My AC Blowing Warm Air? | Rocket Air Conditioning Las Vegas

Why Is My AC Blowing Warm Air? (Las Vegas HVAC Troubleshooting Guide)

There’s nothing worse than coming home on a 110° Las Vegas day, turning on the AC—and feeling hot air blow in your face. If you’re Googling “why is my AC blowing warm air?”, you’re not alone. At Rocket Air Conditioning, this is one of the most common calls we get across Las Vegas, Henderson, and Summerlin, especially during peak summer months.

In this blog, we’ll break down exactly why your air conditioner may be blowing warm air, how serious it is, and when to call in the pros.

1. Low Refrigerant Levels (Leak or Undercharged System)

Your AC needs refrigerant (like Freon or Puron) to cool air. If levels are low due to a leak or improper charge, the system can’t absorb heat—so it just pushes warm air.

What to do:
If your refrigerant is low, it needs more than just a refill. We’ll locate and fix the leak before recharging it properly, so it doesn’t keep happening.

Don’t wait—running your AC with a refrigerant issue can cause permanent compressor damage.

2. Dirty Air Filters Restricting Airflow

A clogged air filter chokes your system and prevents air from flowing over the evaporator coil. That leads to overheating, frozen coils, and—you guessed it—warm air blowing through the vents.

What to do:
Check your air filter. If it’s covered in dust, replace it immediately. We recommend changing filters every 30–60 days in Las Vegas homes, especially if you have pets or allergies.

Still not cooling? Book a professional inspection with Rocket AC.

3. Thermostat Issues

It sounds basic, but your thermostat might be set incorrectly—or malfunctioning. If it’s set to fan instead of cool, your system will circulate room-temperature air instead of cooled air.

What to do:
Double-check your thermostat settings. If that’s not the issue, we can inspect the wiring and replace the thermostat if necessary.

4. Frozen Evaporator Coil

If your AC runs nonstop or airflow is restricted, the evaporator coil can freeze over, disrupting the cooling cycle. Once frozen, your AC can’t pull heat from the air, so warm air circulates.

What to do:
Turn off your system to let it thaw, and call Rocket AC for a full system diagnostic to find the root cause—usually airflow problems or refrigerant issues.

5. Electrical or Compressor Problems

Sometimes, the problem is deeper: your outdoor unit (condenser) isn’t functioning because of a blown fuse, tripped breaker, or failed compressor. If the outdoor unit doesn’t run, no heat can be expelled, so your AC just moves warm air inside.

What to do:
This one’s not a DIY fix. Call us immediately. We’ll inspect the system safely, repair damaged components, and get your cool air flowing again.

Don’t Sweat It — Rocket AC Has You Covered

If your air conditioner is blowing warm air in the middle of a Las Vegas summer, don’t wait. Minor problems can quickly lead to major breakdowns and expensive repairs.

At Rocket Air Conditioning, we offer:

• Same-day diagnostics and repairs
• 24/7 emergency HVAC service
• Fully licensed, local technicians
• Friendly service across Las Vegas, Henderson, Summerlin, and North Las Vegas

📞 Call Rocket AC now or [schedule your repair online →] and get your cool air back—fast. We’ll handle the heat, so you don’t have to.

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