Rooftop Unit
Product service snapshot
Carrier® WeatherMaker® - 4 Ton 13.4 SEER2 Packaged Rooftop Gas Heat & Electric Cool Unit R-410A (575-3-60) is a Carrier® rooftop unit record from the Carrier Enterprise catalog. Catalog model: 48FCEA05A2A1-8B0A0-SP. Product family: 48FC. Green Flow Solution uses this page for commercial model identification, service planning, maintenance conversations, repair diagnostics, and replacement matching.
Technical snapshot
Service planning
Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.
Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.
Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.
GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.
Share the exact alarm, fault, or status message shown on the unit controller, thermostat, service app, or building automation system. Photos of the control screen, unit nameplate, and thermostat/BAS screen help the team understand the issue before dispatch.
Confirm the thermostat or building schedule, whether one tenant space or multiple zones are affected, recent filter or maintenance history, and whether the RTU is locked out, noisy, short cycling, or not responding. Do not open rooftop panels or reset electrical equipment if it is unsafe.
Possible causes include airflow restrictions, dirty filters, economizer or damper issues, sensor or control faults, compressor or reversing-valve issues, defrost problems, refrigerant concerns, electrical faults, or building automation scheduling. A technician needs the full symptom and alarm context to diagnose it safely.
Treat the request as urgent when no heat or no cooling affects occupied space, an alarm or lockout is active, there is electrical odor, unusual noise, water intrusion, unsafe rooftop access, or repeated tenant comfort complaints. Include business hours and access notes when scheduling.
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Quick service
Andrey was very efficient, professional and on time. The team had fast response to questions. Price to do heatpump maintenance was reasonable.
Always on time and I am very satisfied with Green Flow Solutions work. I love that you can contact a human person 24 hours of the day ..
Quick, highly competent and professional. Green Flow did great work.
Max quickly identified the source of the problem with our condensing unit and fixed it. He was very knowledgeable and helpful at explaining what he was observing. He also stuck around to check for other potential issues and gave us advice for future maintenance. He's also very professional...
Andrey and his team did a great jobs for us. We manage over 100+ properties in greater Boston area, and Andrey is the right person for HVAC solutions. Greatly appreciated.
