What are the specs for this Door Switch?

The correct replacement for Goodman model GUN100-4B — 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 GUN100-4B — 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 Switch for GUN100-4B — B1370819

Name: OEM Goodman Blower Door Safety Switch for GUN100-4B — B1370819
Brand: Goodman
SKU: GOODMAN-13159
Price: 22.95 USD
Availability: InStock

SKU: GOODMAN-13159 Brand: Goodman

$22.95 $29.95

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The Goodman B1370819 Door Switch is a direct-fit OEM replacement for the Goodman GUN100-4B furnace and compatible Goodman/Amana/Janitrol models. This blower-compartment interlock cuts power to the furnace whenever the access panel is removed, protecting service techs and preventing operation with the door off. A failed or stuck switch is a common cause of a completely dead furnace.

Specifications

Function: Blower door safety interlock switch
Action: Opens circuit when access panel is removed
Fits: Goodman GUN100-4B and compatible models
OEM Part Number: B1370819
Brand: Goodman (Amana / Janitrol compatible)

OEM vs. Generic

The OEM B1370819 ensures exact plunger travel, mounting, and terminal fit for reliable interlock operation. Our generic equivalent matches the form and function at a lower cost for out-of-warranty repairs. Both are warrantied. Do not defeat this safety switch.

Installation Difficulty

Easy. Disconnect power, unplug the wire leads, unclip or unscrew the switch from its bracket, and install the replacement. A quick 10-minute job.

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...

$22.95

Frequently Asked Questions

Does this Door Switch fit my Goodman GUN100-4B — B1370819?

Yes. This is the factory-specified OEM door switch for the Goodman GUN100-4B — 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 GUN100-4B — 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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