Goodman - 40,000 BTU 80% Gas Furnace - 14" Width - Downflow / Horizontal - Single Stage - 115V - R32 - GD9S800403AN

Goodman - 40,000 BTU 80% Gas Furnace - 14" Width - Downflow / Horizontal - Single Stage - 115V - R32 - GD9S800403AN

The GD9S800403AN Goodman gas furnace features high-quality construction and efficient operation at a great value. The GD9S800403AN single-stage, multi-speed furnace utilizes Goodman's superior heat exchanger design to provide efficient, reliable heating to your home. If you're looking to cut your energy bills and improve your comfort without breaking the bank, your search stops with the Goodman GD9S800403AN.

Features

• This furnace is ideal to heat a smaller house (depending on climate)
• 40,000 BTU 80% efficient natural gas furnace
• Requires metal flue venting
• Can be used in the downflow or horizontal (right or left) orientation
• Can be converted to an LP furnace with a conversion kit (sold separately)
• Innovative design for electrical efficiency, safety, and lower sound output
  

Specifications

Manual

• Installation Manual
• Specifications Sheet
  

What our Experts Think

• Efficient 40,000 BTU Heating: Designed for 40,000 BTU input with 80 % AFUE, this furnace delivers reliable warmth for small to medium‑sized homes, converting most fuel into useful heat.

• Single‑Stage Simplicity: Single‑stage gas valve offers straightforward, dependable heat delivery with fewer moving parts—ideal for homeowners who value simple, long‑lasting performance.

• Multi‑Speed ECM Blower: 9‑speed ECM blower motor enhances airflow control and efficiency, providing smoother distribution and better comfort throughout your living space.

• Downflow/Horizontal Flexibility: Built for downflow or horizontal installation, this furnace easily fits in attics, crawlspaces, closets, or basements with limited clearance.

• Compact 14″ Width: Narrow cabinet design fits well in tight spaces without compromising performance or airflow.

• Durable, Service‑Friendly Build: Features heavy‑gauge steel cabinet, hot‑surface ignitor, and self‑diagnostic control board to simplify maintenance and improve long‑term reliability.

• R‑32 Compliance: Engineered for use with R‑32 refrigerant systems, ensuring compatibility with modern HVAC components.

Q&A

Q: What heating capacity and efficiency does this Goodman furnace deliver?
A: The Goodman GD9S800403AN provides 40,000 BTU input heat with 80% AFUE efficiency, ideal for smaller homes or supplemental heating where dependable, cost‑effective warmth is needed.

Q: What type of operation and stages does it use?
A: It’s a single‑stage gas furnace with a straightforward on/off burner for simple, reliable heating performance.

Q: What blower motor is included?
A: This model includes a multi‑speed ECM blower motor (up to ~1200 CFM) for quieter, more efficient airflow and better comfort control.

Q: What installation orientations are supported?
A: Supports downflow or horizontal (left/right) configurations, making it flexible for basements, attics, crawl spaces, or closets.

Q: What power and fuel does this furnace use?
A: It runs on 115 V single‑phase electrical supply and is factory‑ready for natural gas with optional conversion to LP (propane) using a conversion kit.

Q: What venting requirements are needed?
A: As an 80% AFUE furnace, it requires metal flue venting for combustion exhaust.

Q: What durability and safety features are included?
A: Features include a heavy‑duty aluminized steel heat exchanger, durable hot‑surface igniter, self‑diagnostic control board, and color‑coded low‑voltage terminals for reliable operation and easier service.

Q: What are the physical dimensions?
A: The cabinet measures approximately 33 3/8″ H × 14″ W × 28″ D and weighs around 90 lbs.

Maintenance Tips

• Replace or clean air filters every 1–3 months to maintain proper airflow and prevent dust buildup on the heat exchanger and blower.

• Inspect the heat exchanger annually for cracks or corrosion to ensure safe and efficient operation.

• Clean burners, pilot assembly, and ignition system for reliable single-stage combustion.

• Check the blower motor and fan assembly for dust, debris, and proper lubrication.

• Inspect venting and flue pipe for obstructions or leaks to ensure safe exhaust of combustion gases.

• Test gas valve and thermostat for accurate temperature control.

• Verify 115V electrical connections and check wiring for wear or corrosion.

• Keep surrounding area clear to maintain airflow and reduce fire hazards.

• Schedule annual professional HVAC service for full inspection, cleaning, and safety testing.