What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT045-3 — B1370113 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 GDT045-3 — B1370113.

What symptoms indicate I need a new limit switch?

Common symptoms that indicate you need a new limit 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 limit 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 120°F Auxiliary Limit Switch for GDT045-3 — B1370113

Name: OEM Goodman 120°F Auxiliary Limit Switch for GDT045-3 — B1370113
Brand: Goodman
SKU: GOODMAN-10382
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-10382 Brand: Goodman

$10.95 $14.95

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Goodman B1370113 Auxiliary Limit Switch (120°F)

The Goodman B1370113 is a genuine OEM auxiliary high-limit safety switch rated to open at 120°F, designed for the GDT045-3 gas furnace. This normally-closed thermal switch monitors temperature in the blower or return-air area and cuts power to the burners if it senses an over-temperature condition caused by restricted airflow, a dirty filter, or blower failure. It is a critical safety device that helps prevent overheating and heat-exchanger damage.

Specifications

Part Number: B1370113
Trip Temperature: 120°F (opens on rise)
Type: Auxiliary high-limit / thermal safety switch
Contacts: Normally closed, auto-reset
Compatible Model: GDT045-3 gas furnace
Brand: Goodman (OEM)

OEM vs. Generic

Limit switches are safety components, so exact temperature calibration matters. The OEM B1370113 opens at the precise 120°F rating the GDT045-3 was engineered for. Generic switches with an approximate rating can nuisance-trip or, worse, fail to trip — defeating the safety function. Always replace with the correct OEM part.

Installation Difficulty

Easy (1 of 5). A two-wire, single-screw or clip-mounted swap for a qualified technician. Cut power before service and confirm the switch is fully seated against its mounting surface for accurate sensing.

Restore safe operation with the genuine Goodman B1370113 120°F limit switch — order today.

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 120°F Auxiliary Limi...

$10.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GDT045-3 — B1370113?

Yes. This is the factory-specified OEM limit switch for the Goodman GDT045-3 — B1370113. 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 limit switch on my Goodman GDT045-3 — B1370113?

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 limit switch?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this limit 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 limit 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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