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Why Trane AC running but not cooling?

Discover common reasons why your Trane AC may run yet fail to cool effectively. Learn about refrigerant issues, dirty coils, compressor faults, and control problems.

Reviewed by Content Team

Head of Content, D. Gorenko

Updated June, 5

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Why Trane AC running but not cooling?

 
Common Refrigerant Issues
 

  • Insufficient refrigerant or leaks can cause your Trane AC to run without effective cooling. The refrigerant is crucial for absorbing heat; if levels are low, the cooling process is compromised.
  • Leaks may occur due to damaged coils, joints, or fittings, and often require professional inspection and repair.

 
Dirty or Blocked Condenser Coils
 

  • Over time, the condenser coils can accumulate dirt and debris, reducing heat transfer efficiency. When these coils become blocked, the system struggles to expel heat effectively.
  • Regular cleaning and maintenance are vital to ensure optimal performance, a crucial consideration for clients in St. Louis.

 
Issues with the Compressor
 

  • The compressor is the heart of the AC system, responsible for circulating the refrigerant. A malfunctioning compressor can keep the unit running but prevent the cooling cycle from completing properly.
  • Compressor issues might include electrical problems or mechanical wear, both of which typically need expert diagnosis and repair.

 
Faulty Thermostat or Control Settings
 

  • An inaccurate or malfunctioning thermostat can misread the indoor temperature, causing the system to run longer without effectively reducing the room temperature.
  • Improper settings might result in the AC operating inefficiently, leading to a lack of cooling.

 
Clogged Air Filters and Restricted Airflow
 

  • Dirty or clogged air filters restrict airflow, affecting the unit’s ability to efficiently exchange heat. This means that even if the AC is running, the reduced airflow can prevent proper cooling.
  • Regularly changing or cleaning the air filters is essential to maintain adequate airflow and performance.

 
Electrical or Sensor Malfunctions
 

  • Faulty wiring, malfunctioning sensors, or control board issues can lead to improper functioning of the cooling cycle. This may allow the system to run while not effectively cooling the space.
  • These issues often require professional electrical diagnostics and repairs to ensure safety and proper operation, which is especially important for properties in St. Louis.

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Brentwood, MO
1025 Hanley Industrial
Brentwood, MO 63144

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45 Willow St.
Nashville, TN 37210

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