What are the specs for this Limit Switch?

The correct replacement for Goodman model GMT115-5A — B1370191 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 GMT115-5A — B1370191.

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 Primary Limit Switch 220°F for GMT115-5A — B1370191

Name: OEM Goodman Primary Limit Switch 220°F for GMT115-5A — B1370191
Brand: Goodman
SKU: GOODMAN-12439
Price: 74.95 USD
Availability: InStock

SKU: GOODMAN-12439 Brand: Goodman

$74.95 $99.95

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Goodman B1370191 Primary High-Limit Switch (220°F)

The Goodman B1370191 is a genuine OEM 220°F primary high-limit switch for the Goodman/Amana GMT115-5A gas furnace. Mounted on the heat exchanger bulkhead, this control monitors supply-air temperature and shuts off the burners if the furnace overheats due to low airflow — typically a dirty filter, closed registers, a failing blower, or an undersized duct. A worn or drifting limit switch causes nuisance short-cycling and comfort complaints.

Specifications

Trip temperature: 220°F (auto-reset)
Configuration: Normally closed, opens on temperature rise
Mounting: Bulkhead / heat-exchanger flange
Fits: Goodman GMT115-5A and compatible furnaces
OEM part number: B1370191

OEM vs. Generic

The OEM B1370191 is set to Goodman's precise 220°F trip point with the correct sensing-element length and mounting-hole pattern for your furnace. As a safety limit, the trip temperature and probe depth must match the factory specification exactly — generic switches with the wrong setpoint can either nuisance-trip or fail to protect the heat exchanger. Choose OEM for this control.

Installation Difficulty: Easy to Moderate

Cut power, remove two mounting screws, transfer the wiring, and install the replacement — taking care not to bend the sensing element. Before returning the furnace to service, replace the air filter and verify proper blower airflow so the new limit isn't tripped by the same underlying restriction.

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 Primary Limit Switch...

$74.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMT115-5A — B1370191?

Yes. This is the factory-specified OEM limit switch for the Goodman GMT115-5A — B1370191. 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 GMT115-5A — B1370191?

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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