What are the specs for this Door Switch?

The correct replacement for Goodman model GDT045-3B — B1370819 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 GDT045-3B — B1370819.

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 Furnace Blower Door Switch for GDT045-3B — B1370819

Name: OEM Goodman Furnace Blower Door Switch for GDT045-3B — B1370819
Brand: Goodman
SKU: GOODMAN-10407
Price: 22.95 USD
Availability: InStock

SKU: GOODMAN-10407 Brand: Goodman

$22.95 $29.95

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Goodman B1370819 Blower Door Safety Switch

The Goodman B1370819 is the factory-original blower-compartment door interlock switch for the GDT045-3B gas furnace. This plunger-style safety cuts 120V power to the furnace whenever the blower access panel is removed, preventing the unit from operating with the door off. If your furnace is completely dead — no ignition, no blower, no board lights — a stuck or broken door switch (or a panel that isn't seating the plunger) is one of the first things to check.

Specifications

Part number: B1370819
Type: Blower-door interlock / safety switch
Actuation: Plunger (opens when door removed)
Contact configuration: Normally open (closed with door installed)
Fits: Goodman GDT045-3B furnace
Equipment: Gas furnace

OEM vs. Generic

The OEM Goodman switch ensures the exact plunger length and bracket geometry so the door reliably makes contact. The generic equivalent offers the same interlock function at a lower price. Both are backed by a GDT045-3B fit guarantee.

Installation Difficulty: Easy

A simple 10–15 minute repair. Shut off power at the breaker, transfer the two wires one at a time to avoid mixing them up, unclip or unscrew the old switch, and snap in the replacement. Reinstall the panel and confirm the plunger depresses fully when the door is seated.

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 Furnace Blower Door ...

$22.95

Frequently Asked Questions

Does this Door Switch fit my Goodman GDT045-3B — B1370819?

Yes. This is the factory-specified OEM door switch for the Goodman GDT045-3B — B1370819. 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 GDT045-3B — B1370819?

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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