What are the specs for this Door Switch?

The correct replacement for Goodman model GUN075-3B — 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 GUN075-3B — 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 Blower Door Safety Switch for GUN075-3B — B1370819

Name: OEM Goodman Blower Door Safety Switch for GUN075-3B — B1370819
Brand: Goodman
SKU: GOODMAN-13143
Price: 22.95 USD
Availability: InStock

SKU: GOODMAN-13143 Brand: Goodman

$22.95 $29.95

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Goodman B1370819 Blower Door Interlock Switch

The OEM Goodman B1370819 door switch is a safety interlock on the GUN075-3B furnace that de-energizes the unit whenever the blower access panel is removed. This protects technicians and homeowners from live electrical and moving-blower hazards during service. If your furnace is completely dead with no display, a stuck or broken door switch is a common and inexpensive cause.

Specifications

Function: Blower door safety interlock (cuts power when panel is off)
Action: Plunger-style, normally open — closes when door is installed
Type: Snap-action interlock switch
OEM Part Number: B1370819
Fits: Goodman GUN075-3B furnace

OEM vs. Generic

The OEM Goodman switch matches the exact plunger length and bracket mounting so the door reliably actuates it. Generic switches often have the wrong throw and either fail to close or stay closed with the panel off — defeating the safety function. OEM ensures correct operation.

Installation Difficulty

Easy (2/5) — One or two spade terminals and a mounting clip/screw. Power off, transfer wiring, and align the plunger to the door. Under 15 minutes.

Compatible with Goodman and Amana furnaces using part B1370819.

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 GUN075-3B — B1370819?

Yes. This is the factory-specified OEM door switch for the Goodman GUN075-3B — 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 GUN075-3B — 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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