What are the specs for this Limit Switch?

The correct replacement for Goodman model GSMS100-4 — B1370155 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 GSMS100-4 — B1370155.

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 120°F Auxiliary Limit Switch for GSMS100-4 — B1370155

Name: OEM Goodman 120°F Auxiliary Limit Switch for GSMS100-4 — B1370155
Brand: Goodman
SKU: GOODMAN-12980
Price: 11.96 USD
Availability: InStock

SKU: GOODMAN-12980 Brand: Goodman

$11.96 $15.95

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Goodman B1370155 Auxiliary Limit Switch (120°F)

The genuine OEM Goodman B1370155 is a factory-calibrated auxiliary high-limit switch engineered for the Goodman GSMS100-4 gas furnace and compatible Goodman/Amana models. This bimetallic snap-disc safety control monitors cabinet and blower-compartment temperature, opening the control circuit to shut down the furnace if heat builds beyond safe limits — protecting the heat exchanger, wiring, and surrounding components from overheating damage.

Specifications

Trip point: 120°F auxiliary limit
Type: Automatic-reset bimetallic snap-disc
Fits: Goodman GSMS100-4 and compatible furnaces
OEM Part Number: B1370155
Brand: Goodman (genuine OEM)
Application: Gas furnace safety limit

OEM vs. Generic

The genuine Goodman B1370155 is calibrated to the exact factory trip temperature and mounting footprint, ensuring correct nuisance-free operation. Generic aftermarket switches may vary in trip tolerance or terminal orientation, risking premature lockouts or improper safety response. For a critical safety device, the OEM part is the recommended choice.

Installation Difficulty

Easy (1/5). Disconnect power, remove the two mounting screws and quick-connect terminals, and swap in the replacement. Basic hand tools and 10–15 minutes are typically all that is required. Always confirm power is off at the breaker before servicing.

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 120°F Auxiliary Limi...

$11.96

Frequently Asked Questions

Does this Limit Switch fit my Goodman GSMS100-4 — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman GSMS100-4 — B1370155. 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 GSMS100-4 — B1370155?

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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