What are the specs for this Limit Switch?

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

IMAGE COMING SOON

Goodman

OEM Goodman 300°F Rollout Limit Switch for GMNT040-3B — B1370145

Name: OEM Goodman 300°F Rollout Limit Switch for GMNT040-3B — B1370145
Brand: Goodman
SKU: GOODMAN-11616
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-11616 Brand: Goodman

$4.95 $6.49

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Goodman B1370145 300°F Rollout Switch

The Goodman B1370145 is an OEM 300°F flame rollout switch designed as a direct-fit safety control for the GMNT040-3B gas furnace. The rollout switch monitors the burner box for flame that escapes ("rolls out") from the burners — a condition caused by a blocked heat exchanger or poor venting. When it senses excess heat, it opens the circuit and shuts down the furnace to prevent a fire or CO hazard.

Specifications

Type: Manual-reset flame rollout limit switch
Trip temperature: 300°F (open on rise)
Fits: Goodman GMNT040-3B furnace
Electrical: Normally closed, opens on temperature rise
OEM Part Number: B1370145
Brand: Goodman

OEM vs. Generic

Genuine Goodman OEM rollout switches are calibrated to the exact 300°F trip point and terminal spacing required by the furnace's safety circuit. Generic switches with loose tolerances can nuisance-trip or, worse, fail to open at the rated temperature. On a life-safety component, OEM is the correct choice.

Install Difficulty

Easy — DIY-friendly. The switch mounts to the burner bracket with two screws and connects with quick-disconnect terminals. Always cut power at the disconnect before servicing. If the switch has tripped, diagnose the underlying cause (blocked exchanger or venting) before returning the unit 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 300°F Rollout Limit ...

$4.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMNT040-3B — B1370145?

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

Menu