What are the specs for this Door Switch?

The correct replacement for Goodman model DMS80704BNA — 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 DMS80704BNA — 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 Door Interlock Switch w/ Wires for DMS80704BNA — B1370820

Name: OEM Goodman Door Interlock Switch w/ Wires for DMS80704BNA — B1370820
Brand: Goodman
SKU: GOODMAN-9591
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-9591 Brand: Goodman

$40.95 $53.95

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Goodman B1370820 Blower Door Interlock Switch (with Wires)

The B1370820 is a genuine OEM Goodman blower-compartment door interlock switch, supplied pre-wired with factory lead harness for the DMS80704BNA gas furnace and compatible Goodman/Amana models. This SPST safety switch cuts power to the furnace whenever the blower access door is removed, protecting technicians and preventing operation with the compartment open. A furnace that is completely dead — no display, no blower, no ignition — is often the result of a failed or stuck door switch.

Specifications

Type: SPST normally-open door interlock (plunger actuated)
Supplied with: Factory wire leads / harness
Function: De-energizes furnace when blower door is off
Mount: Blower compartment, factory bracket fit
Fits: Goodman DMS80704BNA and compatible furnaces
Part number: B1370820

OEM vs. Generic

The genuine OEM assembly arrives with the correct plunger length, connector, and pre-terminated wiring, so it drops in without splicing or guesswork. Generic switches frequently require re-terminating leads and can misalign with the door, leading to intermittent no-heat faults. OEM guarantees correct actuation depth and safe operation.

Installation Difficulty

Easy–Moderate (2/5). Typically 15–25 minutes: disconnect power, note wire routing, unclip the old switch, transfer or plug in the harness, and secure. Confirm the plunger seats against the door when closed. Shut off power at the breaker before servicing.

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 Door Switch fit my Goodman DMS80704BNA — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman DMS80704BNA — 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 DMS80704BNA — 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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