What are the specs for this Door Switch?

The correct replacement for Goodman model GSM080-4 — 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 GSM080-4 — 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 Door Interlock Switch w/ Wires for GSM080-4 — B1370820

Name: OEM Goodman Door Interlock Switch w/ Wires for GSM080-4 — B1370820
Brand: Goodman
SKU: GOODMAN-12937
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-12937 Brand: Goodman

$40.95 $52.95

OEM Guaranteed

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Texas CMBL #19328542014

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The genuine Goodman B1370820 Blower Door Switch is the factory interlock safety for the GSM080-4 gas furnace and compatible GMS/GSM 80 series models. Mounted at the blower compartment, it cuts power to the furnace whenever the access panel is removed, preventing the unit from operating with the door open. This part ships with the wire harness already attached, simplifying replacement.

Specifications

Type: Normally-open blower-door interlock switch
Supplied with factory wire leads / harness
Plunger actuation (closes when door is installed)
Mounting: Blower compartment wall bracket
OEM Part Number: B1370820
Fits: Goodman GSM080-4 and related 80 series furnaces

OEM vs. Generic

Because this switch arrives pre-wired with the correct connector and lead lengths, the OEM B1370820 is a true plug-and-play replacement — no crimping or splicing required. Generic door switches are often sold bare, forcing you to reuse aging wires and increasing the risk of a loose connection on a safety circuit. The OEM harness restores the factory fit exactly.

Installation Difficulty

Easy (2 of 5). Disconnect power, unplug the harness at the control board or splice points, remove the switch bracket screws, and mount the new switch and route its wires along the original path. Confirm the plunger is depressed when the door is seated. About a 15–20 minute repair.

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...

$40.95

Frequently Asked Questions

Does this Door Switch fit my Goodman GSM080-4 — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GSM080-4 — 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 GSM080-4 — 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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