I repaired a walk-in cooler for a grocery store. The evaporator fan motor was malfunctioning, causing temperature fluctuations. I replaced the fan motor with a new one from Copeland and tested the system. The refrigeration unit resumed maintaining a steady temperature for food storage.
I responded to a commercial heating issue in a warehouse. The Lennox furnace was experiencing ignition failure, leaving the building without heat. Upon inspection, I found a cracked heat exchanger and faulty igniter. I replaced the heat exchanger with a new one from Lennox and installed a new igniter. I also cleaned the burner assembly and tested the unit for carbon monoxide leakage. After completing repairs, I conducted a full system test to verify proper operation. The heating system was restored to optimal performance, providing efficient and safe heat throughout the warehouse space.
I installed a new commercial HVAC system for a retail store. The system included a York 10-ton rooftop unit with a variable-speed compressor. I mounted the unit on the roof, connected the ductwork, and wired the control systems. I also installed a programmable Honeywell thermostat to improve energy efficiency. After installation, I charged the system with R-410A refrigerant and calibrated the thermostat. I ran multiple tests to ensure even cooling throughout the store, and verified the zoning system was functioning properly. The new system is now providing reliable heating and cooling for the business.
I replaced a faulty compressor on a commercial air conditioning unit. The unit had been running inefficiently, causing inconsistent cooling throughout the building. I installed a new Copeland Scroll compressor and replaced the refrigerant with R-410A. After testing for leaks and ensuring proper airflow, the system was restored to full operation, providing consistent cooling once again.
I installed a new Goodman 5-ton rooftop AC unit for a commercial office. I positioned the unit, connected the electrical lines, and sealed the ductwork. I installed a Johnson Controls thermostat to enhance temperature control. After testing airflow and checking for leaks, the new unit provided optimal cooling for the office space, improving employee comfort.
Repaired Trane Intellipak SXHFC commercial chiller. Diagnosed faulty electronic expansion valve (EEV). Removed old Sporlan SEI-30 valve, installed new SEI-30 with updated software. Recalibrated valve using Trane Tracer software. Checked refrigerant charge, adjusted superheat. Chiller now maintaining proper leaving water temperature.
Replaced faulty compressor in Carrier 48HC rooftop unit. Recovered R-410A refrigerant, removed old compressor, installed new Copeland ZP51K5E-PFV scroll compressor. Brazed connections using oxy-acetylene torch, pressure tested with nitrogen, vacuumed system, and recharged. Checked amperage draw and superheat/subcooling. Unit now cooling properly.
I installed a new Carrier 48HC-D high-efficiency rooftop unit today. First, I secured the 20-ton unit to the commercial building's roof curb per specifications. The thermostat control wiring was connected, and refrigerant linesets were carefully evacuated using a Yellowjacket recovery machine. With a tight vacuum achieved, I charged the system with R-410A refrigerant following Carrier's subcooling targets. The economizer was adjusted for proper ventilation operation.
I completed a repair on a Trane Voyager commercial rooftop unit today. The 15-ton gas/electric unit was experiencing low cooling capacity. Upon inspection, the condenser coils were severely fouled with cottonwood seed debris. Using a 4000 PSI pressure washer, I thoroughly cleaned the coils. The condenser fan motors were seized, so I replaced them with new Genteq motors. After a full system evacuation, I recharged with R-410A to factory specifications. The Trane unit's airflow, superheat, and subcooling were brought back within recommended parameters. Proper cooling is now restored to the commercial space.
I installed a new Hussmann RL4N-G refrigerated merchandiser today. First, I leveled and sealed the unit per manufacturer specifications. The pre-charged refrigeration system was evacuated and leak tested using a Fieldpiece LS3X heated sensor leak detector. Then, the R-404A refrigerant charge was adjusted to achieve optimal superheat and subcooling values. The digital thermostat was calibrated for precise temperature control.
I repaired a commercial HVAC system experiencing airflow issues. I replaced the faulty blower motor with a Genteq 1/2 HP motor and adjusted the belt tension. Using a manometer, I checked and calibrated the system's static pressure to ensure optimal airflow. Finally, I inspected the filters and ductwork to confirm there were no additional blockages or issues.
Earlier this month, in Boston, MA, during an annual tune-up and maintenance session for a commercial client's HVAC system, I discovered a significant airflow blockage in a Carrier Infinity system. The blockage was caused by a heavily soiled filter and accumulation within the ducts. I replaced the old filter with a new HEPA filter and performed a thorough cleaning of the ducts. Additionally, I recalibrated the system's Honeywell programmable thermostat to ensure efficient operation. Post-maintenance testing confirmed the system is now running efficiently, with improved air quality and circulation.
This morning in Boston, MA, annual maintenance call for customer. I thoroughly inspected an HVAC system and here are my findings: The return air temperature was 73°F and the supply air was 53°F, resulting in a good 20° temperature split. The total external static pressure was 0.7 WC, with the return at 0.4 WC and supply at 0.3 WC - I recommend checking and replacing the air filter. The blower wheel, evaporator coil, blower run capacitor, and all gas safety controls were clean and functioning properly. The flame sensor was cleaned during the inspection. Both the condenser fan and compressor run capacitors tested within normal tolerance ranges. I have no other additional notes, as overall the HVAC system is in good operating condition without any major issues present.
Responded to a no cooling call in Boston, MA this week. Upon inspection, discovered frozen evaporator coils on the Carrier 25HBC5 air handler. Performed static pressure checks which revealed high external static pressure at 0.9" WC, likely due to dirty air filters. Changed filters and performed complete air flow inspection. Evaporator coil had also lost charge. Evacuated remaining refrigerant, replaced filter drier, and recharged with 7 lbs of R-410A to factory specifications. Cycle tested, ensuring proper superheat/subcooling. Customer now enjoying 20°F temperature split and cool, dehumidified air flow throughout home.
I just completed an HVAC repair for a commercial customer in Boston, MA. The issue was a clogged air filter, which was restricting airflow and causing the system to run inefficiently. I replaced the filter with the recommended Flanders PrecisionAire model to restore proper air circulation and system performance.