Rooftop Unit
Product service snapshot
Electric Heater Accessory Single Package Rooftop Units Select 12.5 To 27.5 Tons is a Carrier® rooftop unit record from the Carrier Enterprise catalog. Catalog model: CRHEATER285A00. Product family: CRHEATER. 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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Roman was great!
Outstanding service! The technician was not only skilled but also very communicative, providing regular updates about their ETA. The service was incredibly fast, and they resolved the issue efficiently. Great experience overall—highly recommend for reliable and professional HVAC services!
HVAC technician was punctual, followed up well, completed quick repairs, ensured the issue was resolved, and provided helpful recommendations.
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...
Tech identified the problem, replaced the faulty part (flame sensor), and was all done inside 30 minutes. Great job!
It was a pleasure doing business with Green Flow. They kept me informed during the the entire process. The tech (Andrey) was knowledgeable and knew exactly what the problem was with the furnace. The furnace motor was installed the next day and I am satisfied with the job,...
