What are the specs for this Door Switch?

The correct replacement for Goodman model GMT090-5B Furnace — B1370820 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 GMT090-5B Furnace — B1370820.

What symptoms indicate I need a new door switch?

Common symptoms that indicate you need a new door switch include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this door switch 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 Door Switch with Wires for GMT090-5B Furnace — B1370820

Name: OEM Goodman Door Switch with Wires for GMT090-5B Furnace — B1370820
Brand: Goodman
SKU: GOODMAN-12415
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-12415 Brand: Goodman

$40.95 $53.95

OEM Guaranteed

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The Goodman B1370820 Blower Door Safety Switch is a genuine OEM replacement engineered for the Goodman GMT090-5B gas furnace and other compatible Goodman/Amana models. This factory-wired interlock switch cuts power to the blower and control circuit whenever the access panel is removed, protecting service technicians and homeowners from live 24V/line-voltage components. It ships with the pre-terminated wire harness for a plug-and-play swap.

Specifications

Type: Normally-open blower door interlock / safety switch
Includes: Factory wire harness with connectors
Fits: Goodman GMT090-5B and compatible Goodman/Amana furnaces
Function: Interrupts control power when blower door is open
Mounting: Snap/screw-in door bracket (OEM footprint)

OEM vs. Generic

Our OEM B1370820 is the exact Goodman-specified part, guaranteeing correct actuation travel, wire length, and connector fitment so the furnace resumes normal ignition sequencing immediately. Generic universal door switches may require splicing, relocating the bracket, or crimping new terminals, and can trip intermittently if the plunger geometry differs. For a reliable safety circuit, we recommend the OEM part.

Installation Difficulty

Easy (1/5) — Shut off power at the disconnect, remove the blower access panel, unplug the old switch, and clip the new one into the OEM bracket. Typical replacement time is 10–15 minutes with basic hand tools. No refrigerant or gas work required.

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 Door Switch with Wir...

$40.95

Frequently Asked Questions

Does this Door Switch fit my Goodman GMT090-5B Furnace — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMT090-5B Furnace — B1370820. 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 door switch on my Goodman GMT090-5B Furnace — B1370820?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new door switch?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this door switch 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 door switch?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

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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