Salem, MA

Performed routine maintenance on a Carrier WeatherMaker 7.5 Ton 208/230V 3 Phase Rooftop Unit in Boston, MA. Inspected components, cleaned the condenser coils, and tested the refrigerant charge. All systems are functioning well, and the customer is satisfied with the service.

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.

I responded to a service call for a malfunctioning walk-in freezer in Salem, MA earlier this week. Upon arrival, I measured the return air temperature at 28°F, well above the desired setpoint. I performed system diagnostics and determined the issue was a failed evaporator fan motor. I sourced and replaced the 1/2 HP PSC motor and its capacitor, which resolved the malfunction. I evacuated refrigerant lines and recharged them with R-404A to factory specifications, ensuring the freezer maintained -10°F and preserved the client's perishable inventory. I also recommended adding strip curtains to reduce air infiltration and improve energy efficiency.

Repairing a furnace for a new customer in Salem, MA, I diagnosed and replaced a faulty igniter. After installing the new igniter, I tested the furnace to ensure proper ignition and heating functionality.

Executing maintenance on a commercial furnace in Salem, MA, involved tasks such as inspecting burners, cleaning heat exchangers, and testing safety controls. I also checked gas pressure and airflow, making sure they have efficient and safe operation for the business.