What are the specs for this Limit Switch?

The correct replacement for Goodman model GMNT100-4 — B1370188 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 GMNT100-4 — B1370188.

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 170°F Primary Limit Switch for GMNT100-4 — B1370188

Name: OEM Goodman 170°F Primary Limit Switch for GMNT100-4 — B1370188
Brand: Goodman
SKU: GOODMAN-11724
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-11724 Brand: Goodman

$12.95 $16.95

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Goodman B1370188 Primary Limit Switch — 170°F

The B1370188 is a genuine OEM 170°F primary high-limit switch for the Goodman GMNT100-4 gas furnace. Mounted on the heat exchanger deck, the primary limit monitors supply-air temperature and shuts off the gas valve if the furnace overheats — most often due to restricted airflow from a clogged filter, closed registers, or a weak blower. It is one of the furnace's core safety controls.

Specifications

Trip temperature: 170°F
Function: Primary high-limit safety control
Type: Automatic reset (snap-disc)
Compatible model: Goodman GMNT100-4
OEM part number: B1370188
Brand: Goodman (genuine OEM)

OEM vs. Generic

Because the primary limit is a safety-critical control, the genuine OEM B1370188 is recommended for its exact 170°F calibration and correct disc size/mounting. Generic snap-disc limits must match trip temperature, mounting hole pattern, and terminal orientation exactly — do not substitute a different temperature rating.

Installation Difficulty: Easy

Disconnect furnace power, pull the two wire terminals, remove the two mounting screws, and install the new limit in the same orientation on the heat exchanger deck. If the limit has been tripping, replace a dirty filter and confirm proper airflow before returning the unit to service.

Fits Goodman GMNT100-4. In stock and ready to ship.

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 170°F Primary Limit ...

$12.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMNT100-4 — B1370188?

Yes. This is the factory-specified OEM limit switch for the Goodman GMNT100-4 — B1370188. 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 GMNT100-4 — B1370188?

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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