What are the specs for this Door Switch?

The correct replacement for Goodman model GMN100-4 — 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 GMN100-4 — 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 Blower Door Safety Switch for GMN100-4 — B1370820

Name: OEM Goodman Blower Door Safety Switch for GMN100-4 — B1370820
Brand: Goodman
SKU: GOODMAN-11589
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-11589 Brand: Goodman

$40.95 $53.95

OEM Guaranteed

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30-Day Returns

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Texas CMBL #19328542014

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Keep your Goodman GMN100-4 furnace protected with the genuine OEM B1370820 blower door safety switch, supplied with wires for a plug-and-go repair. This interlock switch cuts power to the furnace whenever the blower access panel is removed, preventing operation with the door open. A worn or broken door switch is a common cause of a furnace that appears completely dead — no blower, no ignition, no board lights.

Specifications

OEM Part Number: B1370820
Part Type: Blower-door safety interlock switch
Wiring: Pre-wired with leads (with wires)
Contact Action: Opens when access panel is removed
Brand: Goodman
Fits Model: GMN100-4 (gas furnace)

OEM vs. Generic

The OEM Goodman B1370820 arrives with the correct pre-attached wire leads and mounting tab, so it drops straight into the factory location with matching connectors. Our generic equivalent covers the same interlock function at a lower price, though wire length and connector style may need minor adjustment.

Installation Difficulty

Easy (2 of 5). Roughly 15–20 minutes: shut off power, unplug or splice the two leads, remove the mounting screw, and install the new switch so its plunger contacts the panel. Never tape or defeat the door switch — it is a safety device that prevents the furnace from running with the blower compartment open.

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 Blower Door Safety S...

$40.95

Frequently Asked Questions

Does this Door Switch fit my Goodman GMN100-4 — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMN100-4 — 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 GMN100-4 — 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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