What are the specs for this Door Switch?

The correct replacement for Goodman model GMNT090-3B — 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 GMNT090-3B — 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 Safety Switch with Wires for GMNT090-3B — B1370820

Name: OEM Goodman Door Safety Switch with Wires for GMNT090-3B — B1370820
Brand: Goodman
SKU: GOODMAN-11695
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-11695 Brand: Goodman

$40.95 $53.95

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The Goodman B1370820 Door Safety Switch is a genuine OEM replacement for the blower-compartment interlock on GMNT090-3B and compatible Goodman/Amana gas furnaces. This normally-open switch de-energizes the furnace whenever the blower access panel is removed, protecting the technician and preventing operation with the door off. It ships pre-wired with the factory harness for a plug-and-play install.

Specifications

Type: Blower door interlock / safety switch
Configuration: Normally open, snap-action
Wiring: Pre-terminated harness with connectors included
Fits: Goodman GMNT090-3B and related GMNT/GMS/GMH furnace platforms
OEM Part Number: B1370820

OEM vs. Generic

Our OEM Goodman B1370820 is the exact factory-spec switch with correctly rated contacts and the matching harness plug, so no splicing is required. Universal aftermarket door switches often need wire modification and may not seat properly in the OEM bracket. For guaranteed fit and safety-rated contacts, the OEM part is the recommended choice.

Install Difficulty

Easy (1/5). Typically a 10–15 minute swap: disconnect power, unplug the old switch harness, mount the new switch in the bracket, and reconnect. Basic hand tools only. Always shut off power and gas before servicing.

Compatibility note: Verify your furnace model and existing part number before ordering. Contact info@nationalhvacparts.com with your unit's rating-plate data if you need help confirming fit.

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 Safety Switch w...

$40.95

Frequently Asked Questions

Does this Door Switch fit my Goodman GMNT090-3B — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMNT090-3B — 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 GMNT090-3B — 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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