What are the specs for this Limit Switch?

The correct replacement for Goodman model GMTH115-5 — 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 GMTH115-5 — 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 120F Auxiliary Limit Switch for GMTH115-5 — B1370155

Name: OEM Goodman 120F Auxiliary Limit Switch for GMTH115-5 — B1370155
Brand: Goodman
SKU: GOODMAN-12592
Price: 11.96 USD
Availability: InStock

SKU: GOODMAN-12592 Brand: Goodman

$11.96 $15.95

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Goodman B1370155 Auxiliary Limit Switch (120°F)

The Goodman B1370155 is a genuine OEM auxiliary high-limit switch rated to trip at 120°F, designed for GMTH115-5 gas furnaces. This normally-closed safety switch monitors temperature at the blower or secondary heat area and cuts power to the burners if it senses excessive heat, protecting against overheating from restricted airflow or blower failure.

Specifications

Trip temperature: 120°F (auto-reset)
Type: Auxiliary high-limit safety switch
Contacts: Normally closed
Brand: Goodman (OEM)
Part number: B1370155
Fits: GMTH115-5 furnace

OEM vs. Generic

Limit switches are safety devices, so the trip temperature must be exact. The genuine Goodman B1370155 is calibrated to the furnace's design temperature. Generic switches with even a slightly different set-point can nuisance-trip or, worse, fail to protect the equipment. OEM is strongly recommended for any safety control.

Installation Difficulty

Easy — power off, remove the two mounting screws, transfer the wire connectors, and reinstall. Typically a 10–15 minute job. Verify furnace airflow is clear so the new switch isn't tripping on a real fault.

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 120F Auxiliary Limit...

$11.96

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMTH115-5 — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman GMTH115-5 — 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 GMTH115-5 — 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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