What are the specs for this Door Switch?

The correct replacement for Goodman model GMT070-4 — 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 GMT070-4 — 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 Switch with Wires for GMT070-4 — B1370820

Name: OEM Goodman Door Switch with Wires for GMT070-4 — B1370820
Brand: Goodman
SKU: GOODMAN-12327
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-12327 Brand: Goodman

$40.95 $53.95

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The Goodman B1370820 Blower Door Switch is a genuine OEM safety interlock, supplied with pre-attached wire leads, as a direct-fit replacement for the GMT070-4 gas furnace. This switch cuts power to the furnace whenever the blower access panel is removed, protecting the technician and preventing operation with the door off. A failed door switch is a very common cause of a furnace that appears completely dead — no blower, no ignition, no lights.

Specifications

Type: normally-open plunger interlock switch
Wiring: pre-installed lead wires included
Function: de-energizes furnace when blower door is open
Actuation: closes when access panel is installed
Fits: Goodman GMT070-4 furnace
OEM Part Number: B1370820

OEM vs. Generic

The genuine Goodman assembly arrives with the correct lead length, connectors, and plunger geometry so the door closes cleanly against it. Generic switches often require splicing and re-positioning the bracket, and a poorly seated plunger leads to intermittent power loss. The OEM part is the reliable drop-in.

Install Difficulty

Easy to Moderate. Mount the bracket, connect the two leads, and verify the door depresses the plunger fully. About 15–25 minutes. Always disconnect power before servicing.

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 GMT070-4 — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMT070-4 — 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 GMT070-4 — 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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