Common Causes and Fixes
When summer temperatures climb in Houston, there’s nothing more frustrating than an AC not cooling your house properly. Whether you’re in Sugar Land, Katy, or Braeswood Place, a malfunctioning air conditioner can lead to rising indoor temperatures and growing concern over repair costs. If your air conditioner is blowing warm air or simply can’t keep up with the heat, several issues could be at play.
Dirty Air Filters
One of the most common reasons an AC isn’t cooling effectively is a clogged or dirty air filter. A blocked filter restricts airflow, which reduces efficiency and strains your system. To maintain consistent cooling, we recommend replacing or cleaning your air filter at least every 1–3 months. Regular AC maintenance not only improves airflow but also helps prevent more costly issues down the road.
Low Refrigerant Levels
If your AC is running but the air isn’t cold, your system may be low on refrigerant. This usually signals a leak, which should be addressed immediately. Low refrigerant levels not only hinder cooling but can damage your compressor over time. Professional AC repair services are necessary to diagnose and recharge the system safely.
Thermostat Issues
Sometimes the solution is simpler than you think. If your thermostat is malfunctioning, it may not communicate properly with your HVAC system. Check your thermostat settings and battery, and make sure it’s set to “cool.” If it’s still unresponsive, it may need recalibration or replacement.
Frozen Evaporator Coils
Another culprit behind an AC not cooling the house is frozen evaporator coils. This can happen if airflow is restricted, often due to dirty filters or blocked vents. If you notice ice buildup on your unit or a musty smell from the vents, shut the system off and call in a technician. AC inspections can help pinpoint and prevent coil issues.
Dirty or Blocked Condenser Unit
Located outside your home, the condenser unit plays a critical role in heat exchange. If it’s covered in debris, leaves, or dirt, it can’t release heat properly—leading to an inefficient system. Make sure the area around your AC condenser is clean and call a professional if the problem persists.
Ductwork Leaks
If cool air is escaping through cracks or holes in your ductwork, your AC may seem like it’s not cooling at all. Duct leaks not only reduce efficiency but can also pull in contaminants like dust and mold. A complete HVAC inspection can uncover hidden ductwork issues affecting your comfort.
Don’t Sweat It—We’re Here to Help
At Bellaire Air Conditioning, we’ve helped homeowners in West University Place, Cinco Ranch, Pecan Grove, and beyond stay cool and comfortable for over 40 years. If your air conditioner isn’t cooling your home, don’t wait for the problem to worsen. Our skilled technicians offer fast, affordable service you can trust.
Schedule your AC repair or inspection today and get your home back to the comfort zone.
FAQs
Why is my AC running but not cooling the house?
If your air conditioner is running but not cooling, it could be due to a dirty air filter, low refrigerant levels, a frozen evaporator coil, or issues with the thermostat. Blocked condenser coils or leaky ductwork can also reduce cooling efficiency. It’s important to have your HVAC system inspected to find the root cause and restore proper airflow and cooling.
Should I turn off my AC if it’s not cooling?
Yes, if your AC is running continuously without cooling, it’s best to turn it off. Running the system under stress—such as with frozen coils or a refrigerant leak—can lead to more serious damage. Give your unit a break and schedule a professional AC checkup to avoid worsening the issue.
How do I reset my central AC not blowing cold air?
To reset your central AC, turn the system off at the thermostat and the breaker, wait a few minutes, and then turn it back on. This can resolve minor thermostat or control board glitches. However, if your AC still isn’t blowing cold air after a reset, it may need repair due to mechanical issues or low refrigerant.
Why won’t my AC get colder than 72?
If your air conditioner can’t cool past 72°F, it may be undersized for your home, struggling with airflow blockages, or suffering from poor insulation. Thermostat placement or an aging system could also affect cooling output. Regular maintenance helps ensure your AC performs efficiently and reaches your desired temperature.
How to tell if AC is low on refrigerant?
Signs your AC is low on refrigerant include warm air blowing from vents, ice on the evaporator coils, unusually long cooling cycles, and rising energy bills. If you notice these symptoms, it’s important to have your refrigerant levels professionally checked and recharged if necessary.
Need expert help diagnosing why your AC isn’t cooling? Schedule an AC repair or inspection with Bellaire Air Conditioning today.