What are the specs for this Door Switch?

The correct replacement for Goodman model OEM Goodman Blower Door Interlock Switch w/ Wires — 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 OEM Goodman Blower Door Interlock Switch w/ Wires — B1370820.

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 Interlock Switch w/ Wires — B1370820

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

SKU: GOODMAN-B1370820 Brand: Goodman

$40.95 $53.95

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Goodman B1370820 Blower Door Interlock Switch (Pre-Wired)

The B1370820 is a genuine OEM Goodman blower-door interlock switch supplied with factory wire leads attached, built for the GMT140-5BB gas furnace and compatible Goodman/Amana models. This safety switch cuts power to the furnace whenever the blower access panel is removed, ensuring the unit cannot run with the door open — a code-required protection against electrical and combustion hazards during service.

Specifications

Function: Blower-compartment door interlock (power cutout)
Configuration: Normally open, closes when door is installed
Wiring: Pre-terminated OEM leads included
Fits: Goodman GMT140-5BB and compatible furnaces
OEM Part Number: B1370820

OEM vs. Generic

The genuine Goodman assembly arrives with the correct plunger length, bracket, and pre-wired harness, so it seats against the door exactly as the factory intended. Generic door switches frequently require splicing and plunger adjustment, and an incorrectly seated switch can leave the furnace dead or bypass the safety entirely. OEM saves time and guarantees proper interlock action.

Install Difficulty: Easy to Moderate

Mounting is straightforward, but you'll route and connect the wire leads to the furnace harness. Budget 20–30 minutes. Shut off power at the breaker first, note the original wire routing, and verify the plunger depresses fully when the door is reinstalled.

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 Interloc...

$40.95

Frequently Asked Questions

Does this Door Switch fit my Goodman OEM Goodman Blower Door Interlock Switch w/ Wires — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman OEM Goodman Blower Door Interlock Switch w/ Wires — 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 door switch on my Goodman OEM Goodman Blower Door Interlock Switch w/ Wires — 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 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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