Green Flow Solution logo
Schedule Service

Heat Pump

Back to Carrier products

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

Schedule Service Check Availability
Carrier Residential Heat Pump - 45MHHAQ Heat Pump Repair, maintenance, and replacement planning
Carrier Ductless 18000 Btuh High Wall Indoor Heat Pump Unit (less Sensor) R-454B (208/230-1) product image

Product service snapshot

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

Ductless 18000 Btuh High Wall Indoor Heat Pump Unit (less Sensor) R-454B (208/230-1) is a Carrier®, Bryant®, Payne® heat pump record from the Carrier Enterprise catalog. Catalog model: 45MHHAQ18XC3. Product family: 45MHHAQ. 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 High Wall Indoor Heat Pump Unit (less Sensor) R-454B (208/230-1)
  • Equipment type: Heat Pump
  • Product group: Residential Heat Pump - 45MHHAQ

Technical snapshot

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

Product Specs

  • Model: 45MHHAQ18XC3
  • Manufacturer Number: 45MHHAQ18XC3
  • Vendor Number: 45MHHAQ18XC3
  • Catalog Brand: Carrier®, Bryant®, Payne®
  • Product Family: 45MHHAQ
  • AHRI Usage: Indoor AHU
  • Blower Motor HP: 1/30
  • Blower Motor RPM: 1,200
  • Blower Motor Speeds: 4
  • Blower Motor Type: ECM (Electronically Commutated Motor)
  • Blower Motor Watts: 70
  • Blower Wheel Diameter: 3 9/10
  • Blower Wheel Width: 29 4/5
  • Brand: Carrier®, Bryant®, Payne®
  • CFM: 271-400
  • CFM Heating: 270.7-400.2
  • COP: 2.3
  • Color: White
  • Cooling Capacity: 18,600
  • 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
  • HSPF: 11
  • HSPF2: 10
  • Heating Capacity: 19,200-19,200
  • Height: 12.6
  • Length: 8.9
  • Liquid Line Fitting Type: Flare
  • Liquid Line Size (OD): 1/4"
  • Metering Device: EEV - Electronic Expansion Valve
  • Mounting Type: Wall-Mount
  • Multi Zone: NO
  • Number Of HVAC Zones: 1
  • OPT Code: 1P45MHHAQ18XC3
  • Phase: Single
  • Prop 65: YES
  • Refrigerant: R-454B
  • Remote Control Included: YES
  • SEER2: 23-24
  • Sound Level (dBA): 19-45
  • Stages Cooling: Variable
  • Stages Heating: Variable
  • Suction Line Fitting Type: Flare
  • Suction Line Size (OD): 1/2"
  • Tier: Comfort™
  • Tonnage: 1.5
  • Voltage: 208-230 VAC
  • Weight: 32.8
  • Width: 38.2

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 High Wall Indoor Heat Pump Unit (less Sensor) R-454B (208/230-1) requests

1

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.

2

Describe the service issue

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

3

Review access and history

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

4

Plan the next step

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

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

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

Yes. GreenFlow can help collect the right details for Carrier Ductless 18000 Btuh High Wall Indoor Heat Pump Unit (less Sensor) 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 High Wall Indoor Heat Pump Unit (less Sensor) 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 High Wall Indoor Heat Pump Unit (less Sensor) 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 High Wall Indoor Heat Pump Unit (less Sensor) 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.

Brands We Service

Popular cities

Service Areas

View All

Our Happy Customers

Jennifer A.

Andrey was very knowledgeable & thorough & fixed multiple issues with my old A/C units very quickly during this heatwave.

Andrey B.

Tech identified the problem, replaced the faulty part (flame sensor), and was all done inside 30 minutes. Great job!

Lesley S.

We were very happy with our experience with Green Flow Solution. After our hot water heater was leaking and needed to be replaced, they were able to install a new one the same day. They were professional and thorough. Thank you!

Gary H.

Fast and neat work

Kayla B.

Very responsive. The process was streamlined.

Pratik R.

Andrey was great. Very timely and fixed our HVAC easily. Would love to have him again

View All