What are the specs for this Door Switch?

The correct replacement for Goodman model GMNT140-5B — 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 GMNT140-5B — 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 w/ Wires for GMNT140-5B — B1370820

Name: OEM Goodman Blower Door Safety Switch w/ Wires for GMNT140-5B — B1370820
Brand: Goodman
SKU: GOODMAN-B1370820
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-B1370820 Brand: Goodman

$40.95 $53.95

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Texas CMBL #19328542014

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The Goodman B1370820 Door Switch with Wires is a genuine OEM blower-compartment safety interlock built for the GMNT140-5B furnace and related Goodman/Amana models. This plunger switch cuts power to the furnace whenever the blower access panel is removed, ensuring the burner and inducer cannot operate with the door off. If your furnace is completely dead — no ignition, no blower, no board lights — a stuck or broken door switch is one of the first things to check.

Function: Blower door safety interlock (kills power when panel is off)
Configuration: Plunger-actuated, supplied with pre-attached wire leads and connectors
Action: Normally open; closes when the access door is seated
Fits: Goodman GMNT140-5B and compatible GMN/GMNT series furnaces
Brand: Genuine Goodman OEM

OEM vs. Generic

The genuine Goodman OEM B1370820 arrives with the correct wire length, connectors, and bracket alignment so it drops straight into the factory location. Generic door switches frequently require splicing or bending brackets to fit, and cheaper plungers can wear out or bind. Because this switch controls whether the furnace can run at all, OEM reliability is worth the small premium.

Installation Difficulty

Easy (1 / 5). A typical swap is 10–15 minutes. Disconnect power, disconnect the two leads, unscrew the switch bracket, install the new switch, and reconnect. No calibration needed. Confirm the plunger fully depresses when the blower door is closed.

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 GMNT140-5B — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMNT140-5B — 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 GMNT140-5B — 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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