What are the specs for this Limit Switch?

The correct replacement for Goodman model GMNT120-5 — B1370145 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 — B1370145.

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 300°F Rollout Limit Switch for GMNT120-5 — B1370145

Name: OEM Goodman 300°F Rollout Limit Switch for GMNT120-5 — B1370145
Brand: Goodman
SKU: GOODMAN-11750
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-11750 Brand: Goodman

$4.95 $6.49

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Goodman B1370145 300°F Rollout Limit Switch

The genuine Goodman B1370145 is a flame-rollout safety limit switch engineered for the GMNT120-5 gas furnace and compatible Goodman/Amana models. Mounted on the burner assembly, it monitors for dangerous heat rollout and shuts down the furnace if flame escapes the combustion area — protecting your equipment and home. This is a factory OEM replacement, not a generic substitute, so it matches the original trip point and terminal layout exactly.

Specifications

Trip temperature: 300°F (opens on rise)
Reset type: Manual reset
Function: Flame rollout / burner safety
Terminals: 1/4" quick-connect spade
Fits: Goodman GMNT120-5 and compatible furnaces
OEM Part #: B1370145

OEM vs. Generic

Our OEM Goodman switch guarantees the correct 300°F calibration and UL-recognized safety rating. Generic aftermarket rollout switches may trip at slightly different temperatures, causing nuisance lockouts or, worse, failing to protect against rollout. For a life-safety component, OEM is strongly recommended.

Installation Difficulty

Easy (1/5). A DIY-friendly swap: cut power, unplug the two spade wires, remove the mounting screw, install the new switch, and reconnect. Basic hand tools only. Always confirm your model number before installing and restore power only after wiring is secure.

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 300°F Rollout Limit ...

$4.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMNT120-5 — B1370145?

Yes. This is the factory-specified OEM limit switch for the Goodman GMNT120-5 — B1370145. 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 — B1370145?

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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