What are the specs for this Switch?

The correct replacement for Goodman model GMPN080-4 — 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 GMPN080-4 — B1370820.

What symptoms indicate I need a new switch?

Common symptoms that indicate you need a new 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 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 Door Interlock Switch w/ Wires for GMPN080-4 — B1370820

Name: OEM Goodman Door Interlock Switch w/ Wires for GMPN080-4 — B1370820
Brand: Goodman
SKU: GOODMAN-12086
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-12086 Brand: Goodman

$40.95 $53.95

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Goodman B1370820 Blower Door Interlock Switch (Pre-Wired)

The Goodman B1370820 is a genuine OEM blower-compartment door interlock switch supplied complete with its wire harness, designed for the GMPN080-4 gas furnace and compatible Goodman/Amana units. This safety switch cuts power to the furnace whenever the blower access panel is removed, preventing operation with an open cabinet. If your furnace goes completely dead when the door is off, won't start with the panel installed, or has a broken/burned door-switch plunger, this pre-wired assembly is the direct fix.

Specifications

Type: Normally-open door interlock safety switch
Includes: Factory wire leads / harness
OEM Part Number: B1370820
Compatible model: Goodman GMPN080-4
Equipment type: Gas Furnace
Mounting: Blower access panel bracket

OEM vs. Generic

The OEM Goodman B1370820 arrives with the correct connector, lead length, and plunger geometry so it seats against the door exactly as designed. Generic door switches often require splicing, come with mismatched brackets, or use weaker actuators that fail early. Buying the factory pre-wired assembly saves troubleshooting time and guarantees the interlock functions as a proper safety device.

Installation Difficulty

Easy–Moderate (2/5). Plan on 15–25 minutes. Cut power first, note wire routing, unbolt the old switch bracket, mount the new one, and reconnect the leads. Confirm the plunger depresses fully when the door is latched. A multimeter helps verify continuity before button-up.

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 Door Interlock Switc...

$40.95

Frequently Asked Questions

Does this Switch fit my Goodman GMPN080-4 — B1370820?

Yes. This is the factory-specified OEM switch for the Goodman GMPN080-4 — 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 switch on my Goodman GMPN080-4 — 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 switch?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this 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 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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