Heat Pump

Carrier Ductless 18000 Btuh Heat Pump High Wall Unit R-454B (208/230-1) service and support

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

Product service snapshot

Carrier Ductless 18000 Btuh Heat Pump High Wall Unit R-454B (208/230-1) service details

Ductless 18000 Btuh Heat Pump High Wall Unit R-454B (208/230-1) is a Carrier®, Bryant® heat pump record from the Carrier Enterprise catalog. Catalog model: 45MAHAQ18XA3. Product family: 45MAHA. Green Flow Solution uses this page for residential model identification, service planning, maintenance conversations, repair diagnostics, and replacement matching.

Brand: Carrier
Model or series: Ductless 18000 Btuh Heat Pump High Wall Unit R-454B (208/230-1)
Equipment type: Heat Pump
Product group: Residential Heat Pump - 45MAHA

Technical snapshot

Ductless 18000 Btuh Heat Pump High Wall Unit R-454B (208/230-1) technical snapshot

Product Specs

Model: 45MAHAQ18XA3
Manufacturer Number: 45MAHAQ18XA3
Vendor Number: 45MAHAQ18XA3
Catalog Brand: Carrier®, Bryant®
Product Family: 45MAHA
AHRI Usage: Indoor AHU
Approvals: ETL Listed; UL Listed
Blower Motor HP: 1/25
Blower Motor RPM: 1,190
Blower Motor Speeds: 4
Blower Motor Type: ECM (Electronically Commutated Motor)
Blower Motor Watts: 36-70
Blower Wheel Diameter: 3 9/10
Blower Wheel Width: 29 4/5
Brand: Carrier®, Bryant®
CFM: 294.3-635.7
CFM Heating: 294.29-500.3
COP: 2.3
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: 12.5
Energy Star Rated: YES
Evaporator Coil Fins Per Inch (FPI): 20
HSPF2: 10
Heating Capacity: 18,000-19,500
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: YES
OPT Code: 1P45MAHAQ18XA3
Phase: Single
Prop 65: YES
Refrigerant: R-454B
Remote Control Included: YES
SEER2: 24-26
Sound Level (dBA): 19.5-49.5
Stages Cooling: Variable
Stages Heating: Variable
Suction Line Fitting Type: Flare
Suction Line Size (OD): 1/2"
Tier: Performance™
Tonnage: 1.5
UPC: See Optical
Voltage: 208-230 VAC
Weight: 27.12
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 Ductless 18000 Btuh Heat Pump High Wall 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.

Ductless 18000 Btuh Heat Pump High Wall Unit R-454B (208/230-1) service questions

Can GreenFlow help with Carrier Ductless 18000 Btuh Heat Pump High Wall Unit R-454B (208/230-1) service requests?

Yes. GreenFlow can help collect the right details for Carrier Ductless 18000 Btuh Heat Pump High Wall 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 Ductless 18000 Btuh Heat Pump High Wall 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 Ductless 18000 Btuh Heat Pump High Wall 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 Ductless 18000 Btuh Heat Pump High Wall 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

Ted O.

Quick and professional service. Would give more stars if possible. Just amazing.

Connie F.

I needed a thermostat installed. I called one day they were there the next day. Installed the thermostat and made sure it was working before they left. Came back the next day because no heat was coming out the vents and fixed that issue. No problems since. Thanks...

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Great service! They were able to perform complex repairs as I requested. Instructed me well on future maintenance. Worked fast. Suggested future improvements. Great team, highly recommend.

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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,...

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Andrey as usual prompt in arrival and efficient in service plus excellent communication.

Nicholas M.

I called Green Flow Solutions in a hurry to diagnose and fix an AC unit in a commercial condo unit. They responded quickly, arrived urgently and performed an excellent job on the repair needed. Communication 10/10, professionalism 10/10 and quality 10/10. I will be recommending Green Flow Solutions...