What are the specs for this Limit Switch?

The correct replacement for Goodman model GMNT140-5B — B1370198 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 GMNT140-5B — B1370198.

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 150°F Primary Limit Switch for GMNT140-5B — B1370198

Name: OEM Goodman 150°F Primary Limit Switch for GMNT140-5B — B1370198
Brand: Goodman
SKU: GOODMAN-B1370198
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-B1370198 Brand: Goodman

$12.95 $16.95

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The Goodman B1370198 Primary Limit Switch is a genuine OEM high-temperature safety control engineered for the GMNT140-5B gas furnace and other compatible Goodman/Amana multi-position models. Mounted on the heat exchanger or blower deck, this limit switch continuously monitors supply-air temperature and interrupts the burner circuit if the furnace overheats — protecting the heat exchanger and preventing unsafe operation. When a furnace short-cycles, trips on high limit, or the blower runs without heat, a failed limit switch is a common cause.

Trip point: 150°F (opens on temperature rise)
Type: Primary high-limit / temperature-sensing safety switch
Terminals: Standard 1/4" quick-connect spade
Fits: Goodman GMNT140-5B and compatible GMN/GMNT series furnaces
Brand: Genuine Goodman OEM

OEM vs. Generic

Choosing the genuine Goodman OEM B1370198 guarantees the exact trip temperature, mounting footprint, and UL-recognized calibration your furnace's safety chain was designed around. Generic aftermarket limits may look similar but often differ in reset behavior or trip tolerance, which can cause nuisance lockouts or fail to protect the heat exchanger. For a safety-critical control, OEM is the recommended choice.

Installation Difficulty

Easy–Moderate (2 / 5). Replacement takes most homeowners 15–20 minutes with a nut driver and needle-nose pliers. Always shut off power and gas before servicing. Note wire positions, remove the two mounting screws, transfer the leads, and reinstall. If unsure about the safety circuit, have a licensed HVAC technician perform the swap.

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 150°F Primary Limit ...

$12.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMNT140-5B — B1370198?

Yes. This is the factory-specified OEM limit switch for the Goodman GMNT140-5B — B1370198. 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 GMNT140-5B — B1370198?

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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