What are the specs for this Limit Switch?

The correct replacement for Goodman model GMT115-5 — B1370145 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 GMT115-5 — B1370145.

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 Rollout Limit Switch 300°F for GMT115-5 — B1370145

Name: OEM Goodman Rollout Limit Switch 300°F for GMT115-5 — B1370145
Brand: Goodman
SKU: GOODMAN-12429
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-12429 Brand: Goodman

$4.95 $6.49

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The Goodman B1370145 is a genuine 300°F manual-reset rollout limit switch for GMT115-5 series gas furnaces. This safety device sits near the burners and cuts power to the gas valve if flame rolls out of the combustion chamber — a serious condition usually caused by a blocked flue, cracked heat exchanger, or restricted airflow. A tripped or failed switch stops the furnace from firing.

Specifications

Trip Temperature: 300°F (manual reset)
OEM Part Number: B1370145
Fits Model: GMT115-5 gas furnace
Brand: Goodman
Type: Bimetallic flame-rollout safety cutoff

OEM vs. Generic

Because this is a life-safety limit, the trip point must be exact. Our genuine Goodman switch is calibrated to open at the correct 300°F threshold. A generic switch with the wrong rating either nuisance-trips or, worse, fails to cut off during a real rollout event. Never substitute an off-spec safety control. Important: if the original switch tripped, diagnose and fix the root cause before replacing it.

Installation Difficulty

Easy — about 15 minutes. Disconnect power, unplug the two spade terminals, remove the mounting screws, and install the exact-match replacement in the same position. Test furnace operation and confirm the switch stays closed during a normal heat cycle.

Genuine safety part, fast shipping, from NationalHVACParts.com.

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 Rollout Limit Switch...

$4.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMT115-5 — B1370145?

Yes. This is the factory-specified OEM limit switch for the Goodman GMT115-5 — B1370145. 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 GMT115-5 — B1370145?

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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