What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT045-3B — B1370145 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 — B1370145.

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 Rollout Limit Switch for GDT045-3B — B1370145

Name: OEM Goodman 300°F Rollout Limit Switch for GDT045-3B — B1370145
Brand: Goodman
SKU: GOODMAN-10404
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-10404 Brand: Goodman

$4.95 $6.49

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Goodman B1370145 300°F Flame Rollout Limit Switch

The Goodman B1370145 is a genuine OEM manual-reset flame rollout limit switch rated to open at 300°F, designed for GDT045-3B gas furnaces. This safety control monitors the burner box for flame rollout and de-energizes the gas valve if flames escape the combustion chamber, protecting the furnace and home from overheating. A tripped or failed switch blocks ignition and is a critical safety component that must be replaced with an exactly rated part.

Specifications

Open temperature: 300°F
Reset type: Manual push-button
Part number: B1370145
Compatible model: GDT045-3B furnace
Type: Flame rollout safety limit switch
Function: Normally closed, opens on over-temperature

OEM vs. Generic

As a life-safety device, the trip temperature and reset behavior must match the furnace design exactly. Genuine Goodman B1370145 switches are calibrated to the correct 300°F set point. A mis-rated generic switch can defeat this protective function — OEM is required, not optional.

Installation Difficulty

Easy (2/5). Usually two spade terminals and a single mounting screw or clip. Shut off power and gas, note the wiring, and swap. If the switch continues to trip, diagnose the underlying cause — blocked flue, dirty burners, or a cracked heat exchanger — before restoring service.

Fits Goodman GDT045-3B. Verify the printed 300°F rating before ordering.

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 Rollout Limit ...

$4.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GDT045-3B — B1370145?

Yes. This is the factory-specified OEM limit switch for the Goodman GDT045-3B — B1370145. 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 — B1370145?

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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