The Goodman 3.5 Ton Multi-Position Air Handler R32 Refrigerant (Model AMST42CU1300) is a high-efficiency indoor air handling unit designed for use with compatible Goodman R-32 refrigerant air conditioning and heat pump systems. Featuring a multi-position cabinet design, direct-drive 9-speed ECM blower motor, factory-installed internal TXV, and all-aluminum evaporator coil, this air handler delivers reliable airflow performance, improved comfort, and efficient HVAC operation.

The AMST42CU1300 provides 3.5-ton (42,000 BTU) capacity and is designed for flexible installation configurations in residential and light commercial applications. Its 9-speed ECM blower motor helps provide efficient airflow control, while the factory-installed thermal expansion valve (TXV) helps regulate refrigerant flow for improved cooling and heat pump performance.

This Goodman air handler includes an all-aluminum evaporator coil, multi-position installation capability, and compatibility with modern R-32 refrigerant systems. The unit is engineered to pair with compatible Goodman outdoor AC and heat pump units for reliable year-round comfort.

The Goodman AMST42CU1300 is an ideal solution for replacement installations and new HVAC system setups requiring dependable airflow management, flexible positioning, and efficient indoor comfort performance.

Key Features

• 3.5 Ton / 42,000 BTU Capacity – Designed for residential and light commercial HVAC applications
• R-32 Refrigerant Compatible – Designed for use with modern R-32 refrigerant systems
• Multi-Position Installation Design – Supports flexible horizontal and vertical installation configurations
• 9-Speed ECM Blower Motor – Provides efficient airflow control and improved comfort performance
• Factory Installed Internal TXV – Helps regulate refrigerant flow for cooling and heat pump applications
• All-Aluminum Evaporator Coil – Provides durable construction and efficient heat transfer
• High-Efficiency Airflow Performance – Helps maintain consistent system operation
• Compatible with Goodman Outdoor Units – Designed for matched AC and heat pump systems
• Compact Cabinet Design – Helps simplify installation in various HVAC applications
• Professional HVAC Application – Suitable for residential replacements and new installations

Compatibility / Installation Notes

The Goodman AMST42CU1300 Air Handler is designed for:

• Goodman R-32 Air Conditioning Systems
• Goodman R-32 Heat Pump Systems
• Residential HVAC Applications
• Multi-Position Indoor Installations
• Replacement Air Handler Applications

Specifications:

• Brand: Goodman
• Model: AMST42CU1300
• Product Type: Multi-Position Air Handler
• Capacity: 3.5 Ton
• Cooling Capacity: 42,000 BTU
• Refrigerant: R-32
• Motor Type: Direct-Drive 9-Speed ECM Blower Motor
• Expansion Device: Factory Installed Internal TXV
• Voltage: 208/230V, 1 Phase
• Configuration: Multi-Position
• Liquid Line Connection: 3/8 Inch
• Suction Line Connection: 7/8 Inch
• Application: Indoor HVAC Installation

Installation Notes:

• Verify compatibility with the matched outdoor condenser or heat pump unit before installation.
• Confirm refrigerant type and system requirements.
• Installation should be completed by a qualified HVAC professional.
• Follow Goodman installation guidelines and local HVAC codes.

Frequently Asked Questions

What is the Goodman AMST42CU1300?
The AMST42CU1300 is a 3.5-ton multi-position air handler designed for R-32 refrigerant systems with a 9-speed ECM blower motor and internal TXV.

What refrigerant does this air handler use?
This model is designed for R-32 refrigerant systems.

Does this unit include a TXV valve?
Yes. It includes a factory-installed internal TXV for cooling and heat pump applications.

Does this air handler include an ECM motor?
Yes. It features a direct-drive 9-speed ECM blower motor for improved airflow control and efficiency.

Is this a complete HVAC system?
No. This is an indoor air handler only and must be paired with a compatible outdoor condenser or heat pump unit.

Can this air handler be installed in different positions?
Yes. The AMST series supports multi-position installation configurations.