What are the specs for this Control Board?

The correct replacement for Goodman model GUN125-5B — B1809904S 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 GUN125-5B — B1809904S.

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

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

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Goodman

OEM Goodman Integrated Furnace Control Board for GUN125-5B — B1809904S

Name: OEM Goodman Integrated Furnace Control Board for GUN125-5B — B1809904S
Brand: Goodman
SKU: GOODMAN-13181
Price: 191.95 USD
Availability: InStock

SKU: GOODMAN-13181 Brand: Goodman

$191.95 $249.95

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Texas CMBL #19328542014

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The Goodman B1809904S Integrated Furnace Control Board is the genuine OEM "brain" of your GUN125-5B gas furnace. This board manages the ignition sequence, gas valve timing, blower and inducer relays, safety limit monitoring, and diagnostic fault codes. If your furnace won't ignite, short-cycles, blows cold air, or flashes an error code, a failed control board is a frequent culprit. Installing the correct OEM board restores factory sequencing and safety logic.

Specifications

Part Number: B1809904S
Type: Integrated furnace control (IFC) circuit board
Control Voltage: 24V thermostat / 120V line input
Functions: Ignition control, blower/inducer relays, limit & flame-sense monitoring, diagnostic LED
Brand: Goodman (Amana/Janitrol family)
Compatibility: GUN125-5B gas furnace

OEM vs. Generic

The genuine B1809904S ships pre-flashed with the correct ignition and blower timing for your furnace model. Generic or "universal" boards may require re-jumpering, can mismatch relay ratings, and often void manufacturer warranty. For a safety-critical component that controls the gas valve, we strongly recommend genuine OEM.

Install Difficulty

Moderate (3 of 5). Roughly 30–45 minutes. Photograph the wiring harness before disconnecting and transfer leads one at a time. Because this board controls the gas valve, we recommend a licensed HVAC technician for installation and post-repair combustion checks.

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...

$191.95

Frequently Asked Questions

Does this Control Board fit my Goodman GUN125-5B — B1809904S?

Yes. This is the factory-specified OEM control board for the Goodman GUN125-5B — B1809904S. 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 control board on my Goodman GUN125-5B — B1809904S?

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 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 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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