When the summer heat is at its peak, a properly functioning air conditioner is essential. However, if you find your air conditioner running but not cooling, it can be frustrating and uncomfortable. At Solution Finders AC & Heating, in Austin, TX we understand how important it is to have a cool and comfortable home. That’s why we’re here to help you understand the most common causes of this issue and what you can do about it.

Air Conditioner Running but Not Cooling: Check Thermostat Settings

Before assuming there is a bigger problem, check your thermostat settings. If you have this problem the thermostat might be set incorrectly.

How to Check Your Thermostat

• Ensure it is set to “cool” and not just “fan” mode.
• Lower the temperature setting to see if it triggers cooling.
• If you have a programmable thermostat, check for incorrect scheduling.

Sometimes, simply adjusting the thermostat can resolve the issue. If not, other factors may be at play.

Dirty or Clogged Air Filters

Another common reason for an air conditioner running but not cooling is a clogged air filter. When filters become too dirty, they restrict airflow, reducing cooling efficiency.

Why Clean Air Filters Matter

• Dirty filters block airflow, causing the AC to overwork.
• Reduced airflow can cause frozen evaporator coils.
• Replacing filters regularly improves efficiency and indoor air quality.

To prevent this problem, check your air filters every month and replace them as needed.

Air Conditioner Running but Not Cooling: Check Refrigerant Levels

Refrigerant is essential for cooling your home. If your air conditioner not cooling, low refrigerant levels might be the culprit.

Signs of Low Refrigerant

• Weak airflow from vents
• Warm air blowing instead of cool air
• Ice forming on refrigerant lines
• Hissing or bubbling noises from the unit

Low refrigerant usually indicates a leak, which requires professional repair. Solution Finders AC & Heating can detect leaks and recharge your system to restore cooling efficiency.

Air Conditioner Running but Not Cooling: Clean Dirty or Blocked Condenser Coils

The outdoor unit’s condenser coils release heat from your home. If they’re covered in dirt and debris, your air conditioner running but not cooling could be due to restricted heat dissipation.

How to Maintain Condenser Coils

• Turn off the unit before cleaning.
• Use a garden hose to gently remove dirt and debris.
• Schedule annual maintenance for a deep clean.

Keeping condenser coils clean helps your system run more efficiently and cool your home properly.

Frozen Evaporator Coils

If your air conditioner not cooling, frozen evaporator coils might be the reason. When airflow is blocked or refrigerant levels are low, the coils can freeze, preventing proper cooling.

What Causes Frozen Coils?

• Dirty air filters restricting airflow
• Low refrigerant levels
• Blocked air ducts
• Running the AC at very low temperatures for extended periods

If you notice ice forming on your indoor unit, turn off the AC and let it thaw before restarting. If the problem persists, call a professional for further diagnosis.

Air Conditioner Running but Not Cooling: Clean Blocked or Leaky Air Ducts

Your ductwork is responsible for distributing cool air throughout your home. If there are leaks or blockages, your air conditioner may struggle to keep up.

How to Identify Duct Issues

• Check for visible damage or disconnected ducts.
• Look for excessive dust buildup around vents.
• Feel for weak airflow in certain rooms.

Sealing leaks and cleaning ducts can restore efficient cooling. Professional duct inspections can also identify hidden problems.

Malfunctioning Compressor

The compressor is the heart of your air conditioning system. If it isn’t working properly, your air conditioner will struggle to cool your home.

Signs of a Failing Compressor

• AC runs but doesn’t cool
• Unusual noises from the outdoor unit
• Circuit breaker trips frequently

Since compressor issues require expert repair, it’s best to contact Solution Finders AC & Heating for professional assistance.

Air Conditioner Running but Not Cooling: Electrical or Capacitor Problems?

Your AC system relies on electrical components, including capacitors, to function. If these fail, you may notice your air conditioner running but not effectively.

Common Electrical Issues

• Faulty capacitors preventing the compressor from starting
• Worn-out contactors stopping electrical flow
• Tripped circuit breakers disrupting power supply

Electrical problems should always be handled by a licensed technician to ensure safety and proper repair.

Undersized or Aging AC Unit

If your air conditioner is too small for your home, it may struggle to keep up with cooling demands. Similarly, if your unit is old, efficiency declines over time.

Air Conditioner Running but Not Cooling: Know When to Replace Your AC

• Your AC is over 10-15 years old.
• It requires frequent repairs.
• Cooling performance has significantly declined.

Upgrading to a newer, energy-efficient model can resolve cooling issues and reduce energy bills.

Lack of Regular Maintenance

Skipping routine maintenance can lead to various issues that cause your air conditioner running but not cooling problem.

Benefits of Regular Maintenance

• Keeps components clean and working efficiently.
• Prevents unexpected breakdowns.
• Extends the lifespan of your system.

Scheduling annual maintenance with Solution Finders AC & Heating ensures optimal performance year-round.

Air Conditioner Running but Not Cooling: When to Call a Professional

If your air conditioner is running but not cooling, and none of these solutions work, it’s time to call in the experts. Solution Finders AC & Heating in Austin, TX provides professional diagnostics, repairs, and maintenance to keep your home cool and comfortable. Don’t let cooling issues disrupt your comfort—contact us today for fast and reliable service.