What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT045-3B — B1370195 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 GDT045-3B — B1370195.

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 300°F Primary Limit Switch for GDT045-3B — B1370195

Name: OEM Goodman 300°F Primary Limit Switch for GDT045-3B — B1370195
Brand: Goodman
SKU: GOODMAN-10406
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-10406 Brand: Goodman

$10.95 $13.95

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Goodman B1370195 Primary Limit Switch (300°F)

The Goodman B1370195 is the factory-original primary high-limit switch for the GDT045-3B gas furnace. Mounted on the heat-exchanger bulkhead, this normally-closed control continuously monitors supply-plenum temperature and opens the gas-valve circuit if it reaches its 300°F trip point. It's the furnace's principal defense against a cracked heat exchanger, blocked airflow, or a stuck blower — shutting down combustion before dangerous temperatures develop.

Specifications

Part number: B1370195
Type: Primary high-limit switch
Trip temperature: 300°F (open on rise)
Contact configuration: Normally closed (auto-reset)
Fits: Goodman GDT045-3B furnace
Equipment: Gas furnace

OEM vs. Generic

Choose the OEM Goodman part for a guaranteed exact trip-point, disc size, and mounting-bracket match — critical for a safety component. The generic alternative delivers the same 300°F rating at a lower cost. Both are guaranteed to fit the GDT045-3B.

Installation Difficulty: Easy to Moderate

About a 20-minute repair. Kill power at the breaker, photograph the wiring, remove the two mounting screws and spade connectors, then install the replacement in the same orientation. Because this is a primary safety, confirm proper airflow and combustion after the repair; if the switch tripped without an obvious cause, have a licensed technician inspect the heat exchanger.

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 300°F Primary Limit ...

$10.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GDT045-3B — B1370195?

Yes. This is the factory-specified OEM limit switch for the Goodman GDT045-3B — B1370195. 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 GDT045-3B — B1370195?

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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