What are the specs for this Limit Switch?

The correct replacement for Goodman model GMT140-5BB — 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 GMT140-5BB — 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 GMT140-5BB — B1370155

Name: OEM Goodman 120F Auxiliary Limit Switch for GMT140-5BB — B1370155
Brand: Goodman
SKU: GOODMAN-B1370155
Price: 11.96 USD
Availability: InStock

SKU: GOODMAN-B1370155 Brand: Goodman

$11.96 $15.95

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Goodman B1370155 120°F Auxiliary Limit Switch

The B1370155 is a genuine OEM Goodman auxiliary limit switch built for the GMT140-5BB gas furnace and related Goodman/Amana equipment. Mounted near the blower compartment, this secondary high-limit control opens at 120°F to protect the furnace from overheating if airflow is restricted by a dirty filter, blocked return, or blower fault.

Specifications

Trip temperature: 120°F
Function: Auxiliary / secondary high-limit protection
Type: Normally closed, auto-reset bimetal
Fits: Goodman GMT140-5BB and compatible furnaces
OEM Part Number: B1370155

OEM vs. Generic

The genuine Goodman part matches the factory 120°F calibration and the exact bracket footprint used in the GMT140 cabinet. Aftermarket equivalents often ship with a nearby-but-not-identical trip point, which can cause premature cycling or fail to protect the blower housing. For dependable overheat protection, choose OEM.

Install Difficulty: Easy

This is a quick swap — disconnect the two wire leads, remove the mounting screws, and reverse to install the replacement. Most DIYers finish in 10–15 minutes. Cut power at the breaker before opening the blower door.

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 GMT140-5BB — B1370155?

Yes. This is the factory-specified OEM limit switch for the Goodman GMT140-5BB — 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 GMT140-5BB — 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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