What are the specs for this Door Switch?

The correct replacement for Goodman model GMT115-5A — 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 GMT115-5A — 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 GMT115-5A — B1370820

Name: OEM Goodman Blower Door Safety Switch w/ Wires for GMT115-5A — B1370820
Brand: Goodman
SKU: GOODMAN-12440
Price: 40.95 USD
Availability: InStock

SKU: GOODMAN-12440 Brand: Goodman

$40.95 $53.95

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Goodman B1370820 Blower Door Safety Switch

The Goodman B1370820 is a genuine OEM blower-compartment door safety switch, supplied with factory pre-terminated wire leads for a plug-and-play replacement. It is a direct fit for the Goodman GMT115-5A gas furnace and mounts on the blower panel so the furnace only energizes when the door is securely closed. When this switch fails, the furnace will typically not run at all — a common no-heat symptom.

Specifications

Part Number: B1370820
Type: Normally-open blower door interlock switch
Wiring: Includes pre-attached wire leads
Equipment: Gas furnace
Compatible Model: GMT115-5A
Brand: Goodman (OEM)

OEM vs. Generic

This genuine OEM Goodman switch is built to the exact trip force, wire gauge, and connector spec your furnace's control board expects — no crimping or splicing required. Aftermarket universal switches often need adapted wiring and may not seat correctly in the factory bracket. For a safety interlock, we recommend the OEM part.

Installation Difficulty

Easy (2/5). Cut power at the disconnect, remove the blower door, unplug the old switch leads, swap in the new switch, and reconnect. Typically a 10–15 minute repair for a handy homeowner or any HVAC technician.

Always disconnect power before servicing. If unsure, consult a licensed HVAC professional.

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 GMT115-5A — B1370820?

Yes. This is the factory-specified OEM door switch for the Goodman GMT115-5A — 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 GMT115-5A — 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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