During a recent service visit for a home in Las Vegas, our team at Fast Affordable Air inspected and repaired a central air conditioning system that had stopped cooling properly. The homeowner reported weak airflow and warm air blowing from the vents. Upon arrival, our technician conducted a full diagnostic and uncovered multiple issues affecting system performance.
Initial System Inspection
We started with a visual inspection of the outdoor condenser unit. The access panel was removed to expose the electrical components, including the capacitor and contactor. A Fieldpiece SC260 meter was used to test voltage levels—our meter reading showed 127.8V AC, which is within acceptable range for proper system function. However, some internal signs pointed to deeper problems.
Refrigerant Pressure and Coil Condition
We connected our manifold gauge set to the refrigerant ports to test system pressures. Both service ports were accessible and clearly marked, making the process efficient. After hooking up the hoses, we noted temperature imbalances and suspected an issue with refrigerant flow or airflow. The refrigerant lines were properly insulated with foam sleeves, though one section was slightly degraded, which could contribute to condensation or temperature loss.
Frozen Evaporator Coil
Inside the air handler, we discovered the evaporator coil had frozen over. The copper lines and aluminum fins were covered with ice, which is a telltale sign of restricted airflow or low refrigerant. In this case, airflow restriction was likely caused by a clogged filter or blower issue. Frozen coils prevent the system from absorbing heat effectively, leading to warm air blowing inside the home.
What is an evaporator coil? It’s the part of your air conditioner that absorbs heat from the air inside your home. When it freezes, your AC can’t cool properly.
Component Testing and Fan Motor Diagnosis
Next, we tested the capacitor and verified the performance of the condenser fan motor. The existing motor had failed, which stopped air from being drawn through the outdoor coil. This lack of airflow contributed to refrigerant not condensing properly, adding stress to the system. We replaced the fan motor with a reliable Protech condenser fan motor, a trusted brand in HVAC replacement parts.
All electrical connections were secured and retested after the new motor installation. The dual capacitor was inspected for bulging or leakage and verified as functional.
System Recovery and Cool Air Restored
After allowing the coil to defrost naturally, we restarted the system and observed normal operation. Refrigerant pressure stabilized, airflow at the vents was strong, and supply air temperature dropped to comfortable levels. The home’s central cooling system was back in proper working order.
This repair helps avoid further compressor strain, improves efficiency, and restores cooling comfort during the Las Vegas heat. We recommend annual system maintenance to prevent similar problems in the future. For more tips, see our HVAC Maintenance Guide.
Key Benefits of the Repair
- Better indoor cooling performance
- Restored airflow and energy efficiency
- Prevented long-term compressor damage
- Replaced failing fan motor with a durable Protech part
Fast Affordable Air continues to serve homeowners in Las Vegas, Henderson, and nearby areas with professional heating and cooling repairs. Learn more about our services at fastaffordableair.com.
