What are the specs for this Door Switch?

The correct replacement for Goodman model GMNT070-3B — 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 GMNT070-3B — 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 Switch with Wires for GMNT070-3B — B1370820

Name: OEM Goodman Door Switch with Wires for GMNT070-3B — B1370820
Brand: Goodman
SKU: GOODMAN-11658
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-11658 Brand: Goodman

$40.95 $53.95

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The Goodman B1370820 Blower Door Interlock Switch is a genuine OEM safety switch, supplied pre-wired with its harness, for the GMNT070-3B gas furnace. This normally-open plunger switch prevents the furnace from operating while the blower access panel is removed, cutting line voltage to the control board so no one can be exposed to live wiring or a running blower during service.

Specifications

Type: Plunger / interlock door switch
Configuration: Normally open (closes when door is installed)
Includes: Factory wire harness (pre-terminated leads)
Function: Blower-compartment door safety interlock
OEM part number: B1370820
Primary fit: Goodman GMNT070-3B furnace

OEM vs. Generic

Because this genuine Goodman OEM switch ships with the correct wire harness and connector, installation is plug-and-play with no splicing or crimping. Generic door switches often require you to reuse or fabricate leads, and a poor connection here can leave the furnace dead or unsafe. The complete OEM assembly saves time and guarantees a proper fit.

Install Difficulty

Easy (2/5). Turn off power at the disconnect, remove the blower door, unclip the old switch from its bracket, disconnect the two leads, then snap in the new switch and reconnect the harness. Roughly 15 minutes. If the furnace only runs with the door held closed by hand, this switch is the likely culprit.

Genuine Goodman quality with the full harness included. Verify your model number for correct fitment.

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 GMNT070-3B — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMNT070-3B — 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 GMNT070-3B — 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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