What are the specs for this Door Switch?

The correct replacement for Goodman model GMNT080-4B — 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 GMNT080-4B — 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 Interlock Switch w/ Wires for GMNT080-4B — B1370820

Name: OEM Goodman Door Interlock Switch w/ Wires for GMNT080-4B — B1370820
Brand: Goodman
SKU: GOODMAN-11689
Price: 59.95 USD
Availability: InStock

SKU: GOODMAN-11689 Brand: Goodman

$59.95 $78.95

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Texas CMBL #19328542014

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The Goodman B1370820 Door Switch with Wires is a genuine OEM blower-door interlock assembly for the GMNT080-4B gas furnace and compatible Goodman/Amana models. This normally-open safety switch de-energizes the furnace whenever the blower access panel is removed, protecting technicians and homeowners from live electrical and moving parts. It ships as a complete assembly with the factory wire harness pre-attached for a plug-and-play replacement.

Specifications

Part Number: B1370820 (OEM Goodman)
Type: Blower door interlock safety switch
Includes: Pre-wired harness with connectors
Action: Normally open — closes when door panel is installed
Fit: Goodman GMNT080-4B and compatible furnaces
Equipment: Gas furnace

OEM vs. Generic

The OEM B1370820 arrives with the correct harness length, connector type, and plunger geometry to seat properly against your furnace's door panel. Generic door switches often require splicing and may not align with the panel, causing intermittent power loss or a furnace that won't start. The pre-wired OEM assembly saves time and ensures reliable interlock operation.

Installation Difficulty

Easy (2/5). Around 15–25 minutes. Disconnect power, unplug the old harness, remove the switch mounting screws, install the new switch, and reconnect the harness. Confirm the furnace powers on only when the blower door is fully seated and shuts off when removed. If you are not comfortable working with furnace wiring, consult a licensed HVAC professional.

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 Interlock Switc...

$59.95

Frequently Asked Questions

Does this Door Switch fit my Goodman GMNT080-4B — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMNT080-4B — 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 GMNT080-4B — 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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