What are the specs for this Door Switch?

The correct replacement for Goodman model GMT070-3A — 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 GMT070-3A — 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 with Wires for GMT070-3A — B1370820

Name: OEM Goodman Blower Door Safety Switch with Wires for GMT070-3A — B1370820
Brand: Goodman
SKU: GOODMAN-12310
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-12310 Brand: Goodman

$40.95 $53.95

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Goodman B1370820 Blower Door Safety Switch (with Wires)

The B1370820 is a genuine Goodman blower door interlock safety switch designed for the GMT070-3A gas furnace and other compatible Goodman/Amana models. This normally-open switch cuts power to the blower and burner circuits whenever the blower access panel is removed, protecting technicians and homeowners from live electrical contact and preventing operation with the door open. It ships pre-terminated with factory wiring for a plug-and-play replacement.

Specifications

Type: Blower door interlock / access-panel safety switch
Function: Normally open, opens circuit when panel removed
Includes: Pre-attached wire leads and connectors
Fits: Goodman GMT070-3A and compatible furnaces
OEM Part Number: B1370820
Equipment: Gas furnace

OEM vs. Generic

The OEM B1370820 guarantees exact bracket alignment, correct actuation travel, and factory-rated wire leads — critical for a safety interlock. Generic aftermarket switches can vary in plunger height and mounting, which may cause nuisance trips or fail to break the circuit reliably. For a code-compliant safety device, OEM is strongly recommended.

Install Difficulty

Easy (2/5) — Disconnect furnace power, remove the old switch bracket, transfer the wire leads, and remount. Typical replacement takes 15–20 minutes with basic hand tools. Always verify the switch opens the circuit before restoring power.

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 GMT070-3A — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMT070-3A — 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 GMT070-3A — 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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