What are the specs for this Furnace Control Board?

The correct replacement for Goodman model GMNT045-3B — B1809913S is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number GMNT045-3B — B1809913S.

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Goodman

OEM Goodman Integrated Furnace Control Board for GMNT045-3B — B1809913S

Name: OEM Goodman Integrated Furnace Control Board for GMNT045-3B — B1809913S
Brand: Goodman
SKU: GOODMAN-11629
Price: 229.95 USD
Availability: InStock

SKU: GOODMAN-11629 Brand: Goodman

$229.95 $299.95

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The Goodman B1809913S Integrated Furnace Control Board is the genuine OEM "brains" of your GMNT045-3B gas furnace, supplied complete with the 9-pin wiring harness for a clean, plug-in replacement. This board manages the entire heating sequence — inducer startup, igniter warm-up, gas-valve timing, flame sensing, and blower control — while monitoring the limit and rollout switches for safe operation. It also drives the diagnostic LED that flashes fault codes during troubleshooting.

Specifications

Function: Integrated furnace control (ignition, sequencing, safety monitoring)
Included: Control board + 9-pin wiring harness
Diagnostics: On-board LED fault-code indication
Controls: Inducer, hot-surface igniter, gas valve, blower, flame sense
Fits: Goodman/Amana GMNT045-3B and compatible furnaces
OEM Part #: B1809913S

OEM vs. Generic

An integrated control is not the place to gamble on aftermarket parts. OEM B1809913S is programmed with Goodman's exact ignition and blower timing and matches the original connector pinout, so the included 9-pin harness plugs straight in. Generic or "universal" boards may require rewiring, jumper reconfiguration, and can void the furnace warranty. Choose OEM for guaranteed compatibility and reliable operation.

Installation

Difficulty: Moderate (3/5). Allow 30–45 minutes. Photograph all connections first, cut power at the disconnect, transfer wiring one lead at a time (or reuse the 9-pin harness), and match every terminal to the original layout. After installation, restore power and watch the diagnostic LED through a full heat cycle to confirm normal ignition and blower operation. Before replacing the board, rule out simpler faults — a bad igniter, flame sensor, or blown fuse can mimic board failure.

Shipping Information

Orders placed before 3PM CST ship same business day
Standard delivery: 2-5 business days
Express shipping available at checkout
Free shipping on orders over $75
Tracking number emailed upon shipment

Return Policy

30-day returns on unused parts in original packaging
Electrical parts (capacitors, contactors, control boards) are final sale once installed
Email info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Goodman Integrated Furnace C...

$229.95

Frequently Asked Questions

Does this Furnace Control Board fit my Goodman GMNT045-3B — B1809913S?

Yes. This is the factory-specified OEM furnace control board for the Goodman GMNT045-3B — B1809913S. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the furnace control board on my Goodman GMNT045-3B — B1809913S?

Difficulty: Advanced (1–2 hrs)
Step 1: Turn off breaker. Step 2: PHOTOGRAPH all wire connections before touching anything. Step 3: Label each wire with tape. Step 4: Disconnect all wires, remove old board. Step 5: Mount new board, reconnect all wires matching your photo exactly. Step 6: Restore power and test all modes. Exact part number match is critical.

My HVAC system is completely dead. What could be wrong?

Completely dead HVAC (no LED on board) = failed control board or blown fuse. Check board fuse first (3A or 5A, costs $1–$5). If fuse is good and board has power but no LED, board is dead. Always photograph wiring before replacing.

Is this furnace control board compatible with Bryant or Payne too?

Many Goodman parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my Goodman furnace control board?

OEM essential. Control boards are model-specific with precise firmware and connector layouts. Aftermarket boards rarely match all functions and can cause intermittent failures or safety issues. Always match the exact OEM part number.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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