This morning, I repaired a commercial HVAC system experiencing inconsistent cooling. I identified a faulty TXV (Thermostatic Expansion Valve) and replaced it with a Sporlan valve. Using a digital manifold gauge, I recharged the system with R-410A refrigerant to the correct levels. I also checked and recalibrated the building’s VAV (Variable Air Volume) boxes to ensure even temperature distribution. Finally, I inspected the air handler and cleaned the evaporator coils for optimal performance.