What are the specs for this Door Switch?

The correct replacement for Goodman model DMS81405DNA — 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 DMS81405DNA — 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 Safety Switch w/ Wires for DMS81405DNA — B1370820

Name: OEM Goodman Blower Door Safety Switch w/ Wires for DMS81405DNA — B1370820
Brand: Goodman
SKU: GOODMAN-9636
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-9636 Brand: Goodman

$40.95 $53.95

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Goodman B1370820 Blower Door Safety Switch (with Wires)

The Goodman B1370820 is the factory-original blower-compartment door interlock switch, supplied with its integrated wire harness, for the DMS81405DNA furnace. This safety switch de-energizes the furnace whenever the blower access panel is removed, preventing operation with the door open and protecting service technicians and homeowners from moving parts and electrical hazards. A furnace that won't start after service is frequently caused by a stuck, misaligned, or failed door switch.

Specifications

Part number: B1370820
Type: Plunger-style door interlock (SPST)
Supplied with pre-terminated wire leads
Fits: Goodman DMS81405DNA furnace
Function: Normally-open safety cutoff, closes when panel is seated
Brand: Goodman OEM

OEM vs. Generic

This genuine Goodman OEM assembly arrives with the correct wire gauge, connectors, and lead length pre-installed, so it drops in without splicing or crimping guesswork. Generic replacements often require you to cut and re-terminate leads, and inconsistent plunger travel can leave the furnace intermittently dead. OEM ensures a reliable, code-compliant interlock.

Installation Difficulty

Easy–Moderate (2/5). Cut power at the disconnect, note the wiring, unplug or unscrew the old switch bracket, transfer the harness connections, and mount the new switch so the plunger is fully depressed when the blower door is closed. Confirm the furnace only energizes with the panel installed. Budget 20–30 minutes.

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...

$40.95

Frequently Asked Questions

Does this Door Switch fit my Goodman DMS81405DNA — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman DMS81405DNA — 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 DMS81405DNA — 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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