What are the specs for this Limit Switch?

The correct replacement for Goodman model GMNT120-5 — 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 GMNT120-5 — 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 GMNT120-5 — B1370113

Name: OEM Goodman 120°F Auxiliary Limit Switch for GMNT120-5 — B1370113
Brand: Goodman
SKU: GOODMAN-11745
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-11745 Brand: Goodman

$10.95 $14.25

OEM Guaranteed

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Texas CMBL #19328542014

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The Goodman B1370113 Auxiliary Limit Switch is a genuine OEM safety control engineered for the GMNT120-5 gas furnace. This normally-closed thermal switch opens at 120°F to interrupt burner operation if secondary heat exchanger or blower compartment temperatures climb beyond safe limits, protecting the furnace and your home from overheat conditions.

Specifications

Trip temperature: 120°F (open on rise, auto-reset on cool)
Function: Auxiliary / secondary high-limit protection
Contacts: Normally closed (SPST)
Fit: Goodman/Amana GMNT120-5 and compatible furnace platforms
Type: Bimetal snap-disc thermal switch

OEM vs. Generic

Choosing the genuine OEM B1370113 guarantees the exact trip calibration and mounting footprint Goodman specified for this furnace. Aftermarket snap-discs may share a temperature rating but often vary in reset tolerance and bracket geometry, which can cause nuisance tripping or improper seating. For a safety-critical limit, OEM is the reliable choice.

Installation Difficulty

Easy (DIY-friendly). Replacement is typically two screws and two spade terminals. Always cut power at the breaker before servicing. If the switch trips repeatedly after replacement, investigate airflow restrictions or a cracked heat exchanger rather than replacing the switch again.

Compatible with GMNT120-5. Verify your existing part number before ordering.

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 GMNT120-5 — B1370113?

Yes. This is the factory-specified OEM limit switch for the Goodman GMNT120-5 — 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 GMNT120-5 — 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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