What are the specs for this Door Switch?

The correct replacement for Goodman model OEM Goodman Blower Door Safety Switch w/ Wires — 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 OEM Goodman Blower Door Safety Switch w/ Wires — 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 — B1370820

Name: OEM Goodman Blower Door Safety Switch w/ Wires — B1370820
Brand: Goodman
SKU: GOODMAN-11628
Price: 54.95 USD
Availability: InStock

SKU: GOODMAN-11628 Brand: Goodman

$54.95 $72.95

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The Goodman B1370820 Blower Door Safety Switch is a genuine OEM interlock supplied with pre-attached wire leads, engineered for GMNT045-3B and compatible Goodman and Amana furnaces. This switch cuts power to the burners and blower whenever the blower access door is removed, so the furnace cannot operate with the compartment open — a code-required safety feature that protects service technicians and homeowners.

Specifications

Type: SPST plunger door interlock switch
Configuration: Normally open, closes when door is installed
Wiring: Factory-installed lead wires with terminals
Mounting: Blower compartment bracket
Fits: Goodman/Amana GMNT045-3B and compatible models
OEM Part #: B1370820

OEM vs. Generic

The OEM B1370820 ships complete with the correct pre-wired harness and plunger length for this furnace's door geometry. Generic door switches are often bare (no leads) and require you to source and crimp your own connectors, and an incorrect plunger travel can leave the furnace unable to start. OEM guarantees proper actuation and a plug-and-play install.

Installation

Difficulty: Easy–Moderate (2/5). Roughly 15–20 minutes. Shut off power at the disconnect, note the existing wire routing, unclip the old switch, mount the new one in the same bracket, and connect the pre-wired leads to the control board or line splice. Reinstall the door and confirm the furnace only runs with it fully closed. If the furnace is completely dead, a stuck-open door switch is a frequent, inexpensive cause worth checking first.

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...

$54.95

Frequently Asked Questions

Does this Door Switch fit my Goodman OEM Goodman Blower Door Safety Switch w/ Wires — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman OEM Goodman Blower Door Safety Switch w/ Wires — 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 OEM Goodman Blower Door Safety Switch w/ Wires — 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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