What are the specs for this Limit Switch?

The correct replacement for Goodman model GMNT090-4B — 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 GMNT090-4B — 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 GMNT090-4B — B1370198

Name: OEM Goodman 150°F Primary Limit Switch for GMNT090-4B — B1370198
Brand: Goodman
SKU: GOODMAN-11702
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-11702 Brand: Goodman

$12.95 $16.95

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Goodman B1370198 Primary Limit Switch (150°F)

The B1370198 is the genuine OEM primary high-limit switch for the Goodman/Amana GMNT090-4B gas furnace. Located on the heat exchanger bulkhead, it continuously monitors supply-air temperature and opens the ignition/gas circuit at 150°F if the furnace overheats due to restricted airflow, a failing blower, or a clogged filter. It is the furnace's main overheat safeguard.

Specifications

Type: Auto-reset primary high-limit switch
Open temperature: 150°F (66°C)
Terminals: 2 quick-connect blades
Fits: Goodman/Amana GMNT090-4B and compatible furnace models
OEM Part Number: B1370198

OEM vs. Generic

Because the OEM Goodman part carries the precise 150°F calibration and mounting geometry for this furnace, it restores factory safety performance exactly. Aftermarket universal limits may trip at the wrong temperature, causing short-cycling or leaving the unit under-protected. We recommend OEM.

Installation Difficulty

Easy to Moderate (2/5). Power off, remove the burner/blower access panel, disconnect two wires, unscrew the switch from the heat exchanger plate, and reverse to install. Allow 15–20 minutes.

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 GMNT090-4B — B1370198?

Yes. This is the factory-specified OEM limit switch for the Goodman GMNT090-4B — 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 GMNT090-4B — 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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