What are the specs for this Door Switch?

The correct replacement for Goodman model GUP120-5A — 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 GUP120-5A — 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 Blower Door Safety Interlock Switch for GUP120-5A — B1370819

Name: OEM Goodman Blower Door Safety Interlock Switch for GUP120-5A — B1370819
Brand: Goodman
SKU: GOODMAN-13250
Price: 22.95 USD
Availability: InStock

SKU: GOODMAN-13250 Brand: Goodman

$22.95 $29.95

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Goodman B1370819 Blower Door Interlock Switch

The Goodman B1370819 is a normally-open blower-door safety interlock switch designed for the GUP120-5A gas furnace and other compatible Goodman, Amana, and Janitrol models. This switch is a critical safety device: it interrupts power to the furnace control circuit whenever the blower access panel is removed, preventing the unit from operating with the door open. A failed or stuck interlock is a common cause of a furnace that won't start after service.

Function: Blower-door safety interlock (power cutoff)
Action: Normally open — closes when panel is installed
Fits: Goodman GUP120-5A and cross-referenced Goodman/Amana furnaces
Part number: B1370819

OEM vs. Generic

This is a genuine Goodman OEM switch built to the factory contact rating and mounting footprint. Aftermarket door switches exist at a lower price, but tolerances on the plunger travel and mounting tabs vary — an out-of-spec generic can fail to close reliably, leaving the furnace dead. For a safety-circuit component we recommend the OEM part.

Installation Difficulty

Easy (1/5). Disconnect power, remove the two mounting screws, transfer the wire leads, and reinstall — typically a 10–15 minute job with basic hand tools. Always confirm the switch closes fully with the panel seated.

Verify fitment by part number B1370819 against your unit's parts list before ordering.

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 I...

$22.95

Frequently Asked Questions

Does this Door Switch fit my Goodman GUP120-5A — B1370819?

Yes. This is the factory-specified OEM door switch for the Goodman GUP120-5A — 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 GUP120-5A — 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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