My AC Isn’t Keeping Up

On a 100 degree afternoon, even a healthy system may run nonstop and still sit a few degrees above the setting. That isn’t always a problem. These guides explain the common causes, the simple things you can safely check yourself, and the signs that mean it’s time to turn the system off and let a technician look.

Safety first: if you see ice on the refrigerant lines, water where it shouldn’t be, or the breaker keeps tripping, turn the system off at the thermostat. Running it can make the damage worse.

• Why Is My AC Running Constantly in Texas?
• Why Is My AC Blowing Warm Air?
• Why Is My AC Freezing Up?
• Why Is My Air Conditioner Leaking Water?
• Why Does My AC Keep Tripping the Breaker?
• AC Short Cycling: What It Is and How to Stop It

• Ductwork & Air FlowWhy Rooms Get Hot When You Close the Door: Return Air and Pressure BalanceA bedroom gets hot with the door closed when it has a supply register but no return path. Air blown in can't get back…
• Tips & TricksWhy Is My HVAC System Making Noise? Troubleshooting GuideMost odd HVAC noises point to a specific problem: banging or grinding usually means loose or worn mechanical parts, buzzing and repeated clicking are…

• I just bought a homeGet to know the system you inherited.
• I’m planning a replacementLearn the terms, the tradeoffs and what good design looks like.
• Allergies, dust or stuffy airLearn what actually improves indoor air, and what doesn’t.
• Humidity, sweating vents or musty smellsMoisture is the Central Texas problem most homes have.
• Getting ready for a Texas freezeHow heat pumps and furnaces handle our cold snaps.

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