Trane A801X040AM3SC Single-stage Gas Furnace 40000 Btu/h 80% Afue Multi-positional

Product Description

The Trane A801X040AM3SC is a single-stage, multi-positional residential gas furnace rated at 40,000 BTU/h input with 80% AFUE efficiency. Part of the RunTru by Trane product line, this unit is designed for straightforward installation and reliable heating performance in a 14.5-inch-wide cabinet. It features a tubular aluminized steel heat exchanger and an integrated furnace control board with a seven-segment LED display for setup, status, and diagnostic readout. The blower motor runs at 1,075 RPM with a 1/2 HP rating at 115 volts, 60 Hz, single-phase power. Licensed HVAC technicians install this furnace in new construction and replacement applications.

The A801X040AM3SC is suited for residential forced-air heating systems and is rated for approximately 3-ton cooling capacity, making it appropriate for homes in the 1,500 to 1,800 square foot range. Its multi-positional design supports upflow, downflow, and horizontal installation orientations, giving installers flexibility across a range of duct configurations. The 14.5-inch cabinet width is an industry-standard dimension, maintaining compatibility with common cased coils and accessories. The unit is certified for use with both natural gas and LP gas per ANSI Z21.47 and CSA 2.3.

Key Features

• 40,000 BTU/h input, 80% AFUE single-stage heating
• Tubular aluminized steel heat exchanger for durability and heat transfer
• Multi-positional cabinet supports upflow, downflow, and horizontal configurations
• Integrated furnace control with seven-segment LED display, last six error codes stored, no dip switches
• Adjustable blower off delay for both heating and cooling modes
• All Molex connections throughout for reliable, spade-free wiring
• Air-tight cabinet with 1.4% or less air leakage per ASHRAE 193

Compatibility

The A801X040AM3SC is rated for 3-ton cooling capacity and is compatible with industry-standard cased coils and accessories designed for a 14.5-inch cabinet width. The unit accepts both natural gas and LP gas fuel sources. Superseded variants in this model family include A801X040AM3SDA and A801X040AM3SDB.

Installation Notes

Installation must be performed by a licensed HVAC technician in accordance with local mechanical codes and the manufacturer installer guide. Shut off electrical power and gas supply at the service disconnect and manual gas valve before beginning any service or installation work. Verify gas line sizing, venting configuration, and duct static pressure comply with applicable codes, including ANSI Z223.1 and the International Fuel Gas Code. The open vestibule design provides 34 inches of clearance for ease of access during installation and service.

Technical Specifications

• BTU/h Input: 40,000 BTU/h
• AFUE: 80%
• Stages: Single-stage
• Blower Capacity: 3 ton
• Voltage: 115 volts AC, 60 Hz, 1-phase
• Motor Power: 1/2 HP
• Motor Speed: 1,075 RPM
• Cabinet Width: 14.5 inches
• Cabinet Depth: approximately 28 inches
• Vestibule Height: 34 inches open
• Air Leakage: 1.4% or less per ASHRAE 193
• Fuel Type: Natural gas or LP gas
• Certifications: ANSI Z21.47 / CSA 2.3, ETL listed
• Install Positions: Upflow, downflow, horizontal

Standard Information

• Brand: Trane
• Manufacturer Part Number: A801X040AM3SC