What are the specs for this Door Switch?

The correct replacement for Goodman model GMT070-4A — 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 GMT070-4A — 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 GMT070-4A — B1370820

Name: OEM Goodman Door Interlock Switch w/ Wires for GMT070-4A — B1370820
Brand: Goodman
SKU: GOODMAN-12337
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-12337 Brand: Goodman

$40.95 $53.99

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Texas CMBL #19328542014

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The Goodman B1370820 Door Switch is a genuine OEM blower-compartment door interlock safety switch, supplied complete with its factory wire harness, for the Goodman GMT070-4A gas furnace. This normally-open switch de-energizes the furnace whenever the blower access panel is removed, preventing the burners and blower from operating with the door off. A failed door switch is a common cause of a furnace that appears completely dead — no ignition, no blower, no board lights.

Specifications

Type: Blower door interlock (plunger/lever actuated)
Contacts: Normally open — closes when door is installed
Includes: Pre-terminated wire harness / leads
OEM Part Number: B1370820
Fits: Goodman GMT070-4A gas furnace
Function: Safety power cutoff on panel removal

OEM vs. Generic

The OEM Goodman assembly arrives with the correct plunger length, mounting bracket, and pre-wired leads matched to your furnace's harness connector — no splicing or guesswork. Generic switches often require cutting and crimping to adapt, and an incorrect plunger travel can leave the circuit open even with the door closed. The OEM part is a plug-and-play fit.

Install Difficulty

Easy to Moderate. Cut power at the disconnect, note the wire routing, unplug or splice the leads, unscrew the old switch bracket, and mount the new one. Verify the plunger is fully depressed when the door is seated. Typical install: 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 Door Interlock Switc...

$40.95

Frequently Asked Questions

Does this Door Switch fit my Goodman GMT070-4A — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMT070-4A — 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 GMT070-4A — 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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