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Few things are more frustrating than turning on your air conditioner during a Texas summer—only to feel warm air blowing from the vents. If this happens, you’re not alone. Many homeowners in DFW face this issue, especially during peak cooling season.
At Tarrant Mechanical, we’ve seen it all. Here are the most common reasons your AC is blowing warm air—and what to do next.
Let’s start simple. Double-check that your thermostat is set to “Cool” and not “Heat” or “Fan Only.” Also ensure the temperature is set low enough for the system to turn on. If your thermostat uses batteries, replacing them could help restore normal operation.
A clogged air filter restricts airflow, which can cause your system to overheat and shut off the cooling cycle. Replace your air filter every 1–3 months to keep your system running efficiently.
Tip: A fresh air filter not only keeps your air cool, but also improves indoor air quality.
Refrigerant is the lifeblood of your air conditioning system. If your AC is blowing warm air, a low refrigerant level is often the culprit—usually due to a leak. Signs of a refrigerant issue include:
This requires professional service. At Tarrant Mechanical, we provide 24/7 AC repair to safely address refrigerant issues.
If your evaporator coils are coated in dust or ice, they can’t absorb heat properly. This leads to warm air circulating through your home. Frozen coils are often the result of restricted airflow (from a dirty filter or blocked vents).
Our HVAC techs can clean the coils and inspect the cause to prevent future freezing.
If your outdoor AC unit has lost power—while the indoor fan still runs—you’ll feel warm air coming from your vents. Check your breaker panel to ensure nothing has tripped. If the breaker keeps flipping, call our team right away for diagnosis.
In some cases, your system might be producing cold air, but leaky ducts are letting that cool air escape before it reaches your rooms. This is especially common in older homes with poorly sealed ductwork.
A professional duct inspection from Tarrant Mechanical can restore airflow and comfort fast.
If your system is more than 10–15 years old, it may struggle to cool your home efficiently. Even well-maintained units lose performance over time. If repairs are becoming frequent, it may be time to consider an HVAC system upgrade.
We provide honest, upfront quotes and help you choose the right system for your home and budget.
If basic troubleshooting doesn’t solve the problem, it’s time to bring in the pros. We offer:
We’ve been serving DFW homeowners for over a decade with fast, reliable service that’s just a phone call away.
If your AC is blowing warm air, don’t wait for the problem to get worse. Tarrant Mechanical is ready to restore comfort to your home with expert service and transparent pricing.
📞 Book your repair today and stay cool all season long!
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