What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT115-5B — 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 GDT115-5B — 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 220F Primary Limit Switch for GDT115-5B — B1370191

Name: OEM Goodman 220F Primary Limit Switch for GDT115-5B — B1370191
Brand: Goodman
SKU: GOODMAN-10503
Price: 67.95 USD
Availability: InStock

SKU: GOODMAN-10503 Brand: Goodman

$67.95 $88.95

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Goodman B1370191 220°F Primary High-Limit Switch

The Goodman B1370191 is a genuine OEM primary high-limit switch built for the GDT115-5B gas furnace and compatible Goodman/Amana models. Positioned on the heat-exchanger/burner bulkhead, this 220°F limit is the furnace's main overheat safety — it opens the gas control circuit when supply-plenum temperatures exceed safe levels, most often due to dirty filters, blocked ductwork, or a stalled blower. A failed primary limit is a frequent cause of furnaces that ignite briefly then shut down on a safety fault.

Specifications

Trip temperature: 220°F (open on rise)
Reset type: Automatic reset
Function: Primary high-limit / heat-exchanger overheat protection
Fits model: GDT115-5B furnace
OEM part number: B1370191
Brand: Goodman (genuine OEM)

OEM vs. Generic

Because the primary limit is safety-critical, the genuine Goodman OEM switch is strongly preferred: it is factory-calibrated to the exact 220°F trip point and uses the correct sensing element length and mounting flange for your model. Generic universal limits require careful cross-referencing and may not seat correctly, risking nuisance trips or unsafe operation.

Installation Difficulty

Moderate (2/5). Requires removing the burner-compartment panel to access the mounting flange (usually two screws) and transferring two spade connectors. Always shut off gas and electrical power first. Plan on 15–20 minutes; professional installation recommended if you're unsure.

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 220F Primary Limit S...

$67.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GDT115-5B — B1370191?

Yes. This is the factory-specified OEM limit switch for the Goodman GDT115-5B — 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 GDT115-5B — 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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