What are the specs for this Limit Switch?

The correct replacement for Goodman model GSMS100-4 — B1370154 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 — B1370154.

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 350°F Rollout Limit Switch for GSMS100-4 — B1370154

Name: OEM Goodman 350°F Rollout Limit Switch for GSMS100-4 — B1370154
Brand: Goodman
SKU: GOODMAN-12979
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-12979 Brand: Goodman

$10.95 $14.95

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The Goodman B1370154 Flame Rollout Limit Switch is a genuine OEM safety control for the GSMS100-4 gas furnace, rated to open at 350°F. Mounted near the burner assembly, it detects flame rollout — flames escaping the heat exchanger — and immediately shuts down the furnace to prevent fire and heat-exchanger damage. If your furnace locks out on a repeated safety fault, a tripped or failed rollout switch (often caused by a blocked flue or cracked heat exchanger) is a prime suspect.

Specifications

Part Number: B1370154
Type: Flame rollout limit switch (manual reset)
Open Temperature: 350°F
Action: Opens on temperature rise, manual reset button
Fits: Goodman GSMS100-4 furnace
Brand: Genuine Goodman OEM

OEM vs. Generic

The OEM B1370154 guarantees the exact 350°F trip point and correct bracket/terminal layout for the GSMS100-4. A generic switch with a different setpoint can either nuisance-trip or fail to protect against genuine rollout. On a life-safety component this small and inexpensive, the OEM part is always worth it. Important: if a rollout switch has tripped, diagnose and correct the root cause (blocked venting, dirty burners, cracked heat exchanger) before returning the furnace to service.

Install Difficulty

Easy (1/5) — Disconnect power, unscrew the switch from the burner bracket, and transfer the two spade terminals. A 10-minute swap — but the underlying rollout cause must be professionally investigated.

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 350°F Rollout Limit ...

$10.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GSMS100-4 — B1370154?

Yes. This is the factory-specified OEM limit switch for the Goodman GSMS100-4 — B1370154. 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 — B1370154?

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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