Heat Pump

Carrier 12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) service and support

Carrier Residential Heat Pump - 45MPHAQ Heat Pump Repair, maintenance, and replacement planning

Product service snapshot

Carrier 12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) service details

12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) is a Carrier®, Bryant® heat pump record from the Carrier Enterprise catalog. Catalog model: 45MPHAQ12XA3. Product family: 45MPHAQ. Green Flow Solution uses this page for residential model identification, service planning, maintenance conversations, repair diagnostics, and replacement matching.

Brand: Carrier
Model or series: 12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1)
Equipment type: Heat Pump
Product group: Residential Heat Pump - 45MPHAQ

Technical snapshot

12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) technical snapshot

Product Specs

Model: 45MPHAQ12XA3
Manufacturer Number: 45MPHAQ12XA3
Vendor Number: 45MPHAQ12XA3
Catalog Brand: Carrier®, Bryant®
Product Family: 45MPHAQ
AHRI Usage: Indoor AHU
Blower Motor HP: 1/25
Blower Motor RPM: 700-1,350
Blower Motor Speeds: 4
Blower Motor Type: ECM (Electronically Commutated Motor)
Blower Motor Watts: 42
Blower Wheel Diameter: 3 9/10
Blower Wheel Width: 29 4/5
Brand: Carrier®, Bryant®
CFM: 153-423.8
CFM Heating: 320-380
COP: 2.5
Color: White
Cooling Capacity: 3,100-16,500
Cooling Rated Capacity Btu/h: 12000
Country Of Origin: CHN
Cycle/Hertz: 60 Hz
Drain Connection Size: 5/8"
EER2: 14
Energy Star Rated: YES
Evaporator Coil Fins Per Inch (FPI): 20
HSPF: 11
HSPF2: 12
Heating Capacity: 4,100-17,200
Height: 12.56
Length: 9.41
Liquid Line Fitting Type: Flare
Liquid Line Size (OD): 1/4"
Metering Device: EEV - Electronic Expansion Valve
Mounting Type: Wall-Mount
Multi Zone: NO
OPT Code: 1P45MPHAQ12XA3
Phase: Single
Prop 65: YES
Refrigerant: R-454B
Remote Control Included: YES
SEER2: 28
Sound Level (dBA): 19-41.5
Stages Cooling: Variable
Stages Heating: Variable
Suction Line Fitting Type: Flare
Suction Line Size (OD): 3/8"
Tier: Infinity™
Tonnage: 1
UPC: See Optical
Voltage: 208-230 VAC
Weight: 28.22
Width: 37.99

Useful troubleshooting details

Confirm the exact model number, serial number, installed equipment type, and site voltage before service or replacement planning.
Match replacement equipment and accessories against current Carrier compatibility requirements, refrigerant type, capacity, airflow, and local code requirements.

Service planning

How GreenFlow handles 12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) requests

Identify the equipment

Confirm the model or series name, serial number if available, photos, and whether the unit is roof, exterior, basement, or mechanical-room equipment.

Describe the service issue

Share no heat, no cooling, weak airflow, error codes, alarms, leaks, noise, control problems, or comfort complaints.

Review access and history

Include access notes, tenant or business-hour constraints, filter status, recent repairs, and maintenance records when available.

Plan the next step

GreenFlow can route the request for diagnostics, repair planning, maintenance, replacement scope, or related system upgrades.

12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) service questions

Can GreenFlow help with Carrier 12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) service requests?

Yes. GreenFlow can help collect the right details for Carrier 12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) service requests, including the model, symptoms, equipment age, building type, access notes, photos, and timing.

What symptoms should I mention for 12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1)?

Helpful symptoms include no heat, no cooling, weak airflow, defrost or outdoor icing concerns, auxiliary heat behavior, thermostat issues, short cycling, unusual noise, and whether the request is urgent or planned maintenance.

Is 12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) used for residential or commercial properties?

Heat pump requests may come from homes, condos, multifamily properties, managed buildings, and light-commercial spaces depending on the system type and building layout.

What helps schedule 12000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R-454B (208/230-1) service faster?

Share the exact model and serial number if available, clear photos of the equipment and surrounding access area, current symptoms, recent maintenance history, and whether the request is repair, maintenance, or replacement planning.

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Our Happy Customers

Michael C.

Very fast turnaround time and repair will use again for sure

Karina D.

Fast response, great communication, reliable quality - great overall experience!

Benjamin B.

Great Service, fast and super friendly!

Daniel M.

Responsive company, timely installation professionally done. Hannah is great!

Neil R.

Fantastic timely service and maintenance from Green flow. They came in and assessed our problem, then within 48 hours had resolved our issue. Amazing, professional service who will we will continue to use for maintenance. I do want to thank our technician, who was on time and his...

Andrea W.

Andrey was quick, efficient, and professional. He was also very informative about the condition of the heat pump and gave options for repair/replacement. His cost estimates are reasonable. Highly recommend.