What are the specs for this Limit Switch?

The correct replacement for Goodman model GMNT090-3B — 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 GMNT090-3B — 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 GMNT090-3B — B1370198

Name: OEM Goodman 150°F Primary Limit Switch for GMNT090-3B — B1370198
Brand: Goodman
SKU: GOODMAN-11694
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-11694 Brand: Goodman

$12.95 $16.95

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The Goodman B1370198 Primary High-Limit Switch is a genuine OEM safety control for the GMNT090-3B gas furnace. Mounted on the heat-exchanger/supply-air side, this primary limit opens at 150°F to shut off the burners if supply-air temperature climbs too high — protecting the heat exchanger from cracking due to restricted airflow. It is one of the furnace's most important safety devices.

Specifications

Part Number: B1370198
Type: Primary high-limit switch
Trip Temperature: 150°F (open on rise, auto-reset)
Compatible Model: GMNT090-3B (90,000 BTU furnace)
Brand: Goodman (OEM)

OEM vs. Generic

The OEM B1370198 is calibrated to Goodman's 150°F primary setpoint and the exact bracket used on the GMNT090-3B. Because the primary limit governs safe heat-rise, an off-spec generic switch can either short-cycle the burners or fail to protect the heat exchanger. Matching the OEM disc temperature and mounting position is essential. Repeated trips usually indicate an airflow restriction — inspect the filter, blower, and ductwork.

Installation Difficulty: Easy

Rated 2/5. With power and gas off, remove the mounting screws, move the two spade connectors to the new switch, and remount it flush to the heat-exchanger panel. Typically a 10–15 minute job. Never bypass a primary limit switch.

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 GMNT090-3B — B1370198?

Yes. This is the factory-specified OEM limit switch for the Goodman GMNT090-3B — 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 GMNT090-3B — 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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