What are the specs for this Limit Switch?

The correct replacement for Goodman model GMN100-4 — 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 GMN100-4 — 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 GMN100-4 — B1370113

Name: OEM Goodman 120°F Auxiliary Limit Switch for GMN100-4 — B1370113
Brand: Goodman
SKU: GOODMAN-11581
Price: 24.95 USD
Availability: InStock

SKU: GOODMAN-11581 Brand: Goodman

$24.95 $32.95

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Goodman B1370113 120°F Auxiliary Limit Switch

The B1370113 is a genuine Goodman OEM auxiliary limit switch rated to open at approximately 120°F, designed for the GMN100-4 gas furnace. This normally-closed safety control monitors cabinet and blower-compartment temperature and cuts power to the burners if airflow is lost or heat builds beyond safe limits. A failed or nuisance-tripping limit switch causes short cycling, no-heat calls, or a furnace that won't fire — replacing it restores safe, reliable heating.

Specifications

Open temperature: ~120°F (auto-reset)
Type: Auxiliary / secondary limit, normally closed
OEM Part Number: B1370113
Fits: Goodman GMN100-4 and compatible furnaces
Function: Over-temperature and loss-of-airflow safety cutout
Brand: Goodman / Amana

OEM vs. Generic

The OEM Goodman switch is factory-calibrated to the exact 120°F trip point and mounting footprint your furnace expects. A generic substitute with a different set point or terminal layout can cause premature trips or defeat a critical safety function. For heating safety, always match the OEM specification.

Install Difficulty

Easy — Two mounting screws and quick-connect spade terminals. Typically a 10–15 minute repair with a nut driver. Shut off gas and electrical power before servicing.

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...

$24.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMN100-4 — B1370113?

Yes. This is the factory-specified OEM limit switch for the Goodman GMN100-4 — 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 GMN100-4 — 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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