When a commercial air conditioner is running but failing to cool a building efficiently, there are typically three primary causes identified by HVAC experts:
- Dirty Evaporator Coils: These coils become fouled over time, which restricts heat absorption and chokes necessary airflow. This results in the air coming from the vents feeling tepid rather than cold.
- Low Refrigerant Charge: Often the result of a slow leak, an insufficient amount of refrigerant prevents the system from rejecting heat effectively, making it nearly impossible to lower the building’s temperature.
- Failing Compressor: A compressor may continue to run but lose the ability to achieve the pressure required for proper cooling. This forces the entire system to work harder for significantly diminished results.
Additionally, a dirty air filter often exacerbates these three problems by starving the unit of airflow and accelerating general wear on all components.
Professional diagnostics are recommended to distinguish between these issues. Routine preventative maintenance can help avoid these efficiency drops by catching coil fouling and refrigerant leaks before they impact the comfort of your customers and employees.
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