What are the specs for this Limit Switch?

The correct replacement for Goodman model GMNT040-3B — B1370254 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 GMNT040-3B — B1370254.

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 Stack Overtemp Limit Switch for GMNT040-3B — B1370254

Name: OEM Goodman Stack Overtemp Limit Switch for GMNT040-3B — B1370254
Brand: Goodman
SKU: GOODMAN-11620
Price: 13.95 USD
Availability: InStock

SKU: GOODMAN-11620 Brand: Goodman

$13.95 $17.95

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The Goodman B1370254 Stack Overtemp Limit Switch is a genuine OEM safety control designed for GMNT040-3B gas furnaces and compatible Goodman/Amana models. This manual-reset high-limit switch monitors flue and heat-exchanger temperatures, opening the circuit to shut down the burners if the unit overheats — protecting the heat exchanger from cracking and preventing dangerous overtemp conditions.

Specifications

Part Number: B1370254
Type: Stack / overtemp limit switch (safety cut-out)
Reset: Manual push-button reset
Fits: Goodman GMNT040-3B and compatible furnaces
Function: Opens on excessive temperature rise

OEM vs. Generic

This is a genuine Goodman OEM part, calibrated to the exact trip temperature specified for your furnace. Generic aftermarket limit switches may open at the wrong setpoint, causing nuisance lockouts or — worse — failing to trip when they should. For a safety-critical component, OEM is the recommended choice.

Installation Difficulty

Easy (1/5). Disconnect power, unplug the two spade terminals, remove the mounting screws, and swap in the new switch. Typical replacement takes 10–15 minutes with basic hand tools. If the switch tripped, always diagnose the root cause (dirty filter, blocked flue, failing blower) before returning the furnace to service.

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 Stack Overtemp Limit...

$13.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMNT040-3B — B1370254?

Yes. This is the factory-specified OEM limit switch for the Goodman GMNT040-3B — B1370254. 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 GMNT040-3B — B1370254?

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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