Heat Pump

Carrier 18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (208/230-1) service and support

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

Product service snapshot

Carrier 18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (208/230-1) service details

18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (208/230-1) is a Carrier®, Bryant® heat pump record from the Carrier Enterprise catalog. Catalog model: 45MPHAQ18XA3. 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: 18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (208/230-1)
Equipment type: Heat Pump
Product group: Residential Heat Pump - 45MPHAQ

Technical snapshot

18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (208/230-1) technical snapshot

Product Specs

Model: 45MPHAQ18XA3
Manufacturer Number: 45MPHAQ18XA3
Vendor Number: 45MPHAQ18XA3
Catalog Brand: Carrier®, Bryant®
Product Family: 45MPHAQ
AHRI Usage: Indoor AHU
Blower Motor HP: 0.06
Blower Motor RPM: 1,000
Blower Motor Speeds: 4
Blower Motor Type: ECM (Electronically Commutated Motor)
Blower Motor Watts: 58
Blower Wheel Diameter: 4 4/5
Blower Wheel Width: 34 4/5
Brand: Carrier®, Bryant®
CFM: 630-1,000
CFM Heating: 450-500
COP: 2.5
Color: White
Cooling Capacity: 18,000
Cooling Rated Capacity Btu/h: 18000
Country Of Origin: CHN
Cycle/Hertz: 60 Hz
Drain Connection Size: 5/8"
EER2: 14
Energy Star Rated: NO
Evaporator Coil Fins Per Inch (FPI): 20
HSPF: 11
HSPF2: 12
Heating Capacity: 18,000
Height: 14.57
Length: 10.83
Liquid Line Fitting Type: Flare
Liquid Line Size (OD): 3/8"
Metering Device: EEV - Electronic Expansion Valve
Mounting Type: Wall-Mount
Multi Zone: NO
OPT Code: 1P45MPHAQ18XA3
Phase: Single
Prop 65: YES
Refrigerant: R-454B
Remote Control Included: YES
SEER: 22
SEER2: 28
Sound Level (dBA): 16-43.5
Stages Cooling: Variable
Stages Heating: Variable
Suction Line Fitting Type: Flare
Suction Line Size (OD): 5/8"
Tier: Infinity™
Tonnage: 1.5
UPC: See Optical
Voltage: 208-230 VAC
Weight: 43.65
Width: 44.88

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 18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (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.

18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (208/230-1) service questions

Can GreenFlow help with Carrier 18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (208/230-1) service requests?

Yes. GreenFlow can help collect the right details for Carrier 18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (208/230-1) service requests, including the model, symptoms, equipment age, building type, access notes, photos, and timing.

What symptoms should I mention for 18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (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 18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (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 18000 Btu Ductless High Wall Indoor Heat Pump Fan Coil Unit R454B (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.