What are the specs for this Limit Switch?

The correct replacement for Goodman model OEM Goodman 120°F Auxiliary Limit Switch GDT090-4A — 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 OEM Goodman 120°F Auxiliary Limit Switch GDT090-4A — 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 GDT090-4A — B1370113

Name: OEM Goodman 120°F Auxiliary Limit Switch GDT090-4A — B1370113
Brand: Goodman
SKU: GOODMAN-B1370113
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-B1370113 Brand: Goodman

$10.95 $14.95

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The Goodman B1370113 is a genuine OEM 120°F auxiliary limit switch designed for the GDT090-4A gas furnace and related Goodman/Amana models. This normally-closed thermal safety opens the control circuit if the blower compartment overheats, protecting the heat exchanger and internal wiring from heat damage. A failed or nuisance-tripping limit is a common cause of no-heat and short-cycling calls.

Specifications

Type: Auxiliary high-limit safety switch
Trip temperature: 120°F (auto-reset)
Function: Opens circuit on over-temperature
Fits model: GDT090-4A
OEM part number: B1370113
Brand: Goodman / Amana

OEM vs. Generic

Because a limit switch is a safety device, the OEM part guarantees the exact trip temperature, mounting bracket, and terminal configuration specified by Goodman. Substitute switches with the wrong set-point can either fail to protect the furnace or trip prematurely. For any safety control, OEM is the recommended path.

Installation Difficulty

Easy (2/5) — Disconnect power, unplug the two spade terminals, remove two mounting screws, and reverse to install. A quick, low-cost repair for most DIYers.

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 OEM Goodman 120°F Auxiliary Limit Switch GDT090-4A — B1370113?

Yes. This is the factory-specified OEM limit switch for the Goodman OEM Goodman 120°F Auxiliary Limit Switch GDT090-4A — 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 OEM Goodman 120°F Auxiliary Limit Switch GDT090-4A — 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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