At Fast Affordable Air, we recently responded to a service call for a rooftop central air conditioning system that wasn’t cooling properly. Our licensed technicians inspected every critical component of the unit—from the blower motor to the refrigerant charge—to get this system back to peak performance. Here’s how we did it.
Step 1: Inspecting the Blower Wheel and Motor
We started with the blower assembly. In the photo, you can see the blower wheel spinning properly. This part moves the air through the ducts and into the building. A bad blower motor can cause weak airflow or no air at all.
Step 2: Checking the Condenser Coil
Next, we inspected the outdoor condenser coil. This coil is where the AC releases heat to the outside. A dirty or damaged coil can block this process and cause the system to overheat. Luckily, this coil looked clean and well-maintained—great for efficiency.
Step 3: Compressor and Electrical Connections
We moved on to the heart of the system—the compressor. It’s the part that pumps refrigerant through the coils. We checked the power wires and insulation, which looked good. No burn marks, frayed wiring, or signs of wear were found.
Step 4: Electrical Board and Wiring Diagnosis
Inside the service panel, we confirmed all terminal connections were tight. The wiring was labeled correctly, which helped us trace the power flow and ensure the components were communicating properly. Poor electrical connections can lead to short cycling or failure to start.
Step 5: Pressure Testing with Manifold Gauges
We used Yellow Jacket manifold gauges to measure refrigerant pressure. These gauges show us both the high and low sides of the system. Based on the readings, we confirmed that the refrigerant charge was slightly off. Low refrigerant can cause poor cooling and freeze the evaporator coil.
Step 6: Tuning for Performance
After confirming no leaks, we adjusted the charge. This brought the system within optimal range, which improves cooling performance and lowers the energy bill. A well-charged system doesn’t have to work as hard to cool your home.
Conclusion
This repair was a success. By inspecting each part of the central cooling system, we ensured safe operation and restored the unit’s ability to keep indoor temperatures comfortable during the Las Vegas heat. For more info on how we troubleshoot systems like this, visit our AC repair services page.
