What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT115-5B Furnace — 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 GDT115-5B Furnace — 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 300F Rollout Limit Switch for GDT115-5B Furnace — B1370145

Name: OEM Goodman 300F Rollout Limit Switch for GDT115-5B Furnace — B1370145
Brand: Goodman
SKU: GOODMAN-10500
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-10500 Brand: Goodman

$4.95 $6.49

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Goodman B1370145 300°F Rollout Limit Switch

The Goodman B1370145 is a genuine OEM flame rollout limit switch engineered for the GDT115-5B gas furnace and compatible Goodman/Amana models. Mounted near the burner assembly, this manual-reset safety switch opens at 300°F to shut down the ignition sequence if flames roll out of the burner box — protecting your equipment and home from overheating and fire hazards. A worn or tripped rollout switch is one of the most common causes of a furnace that ignites and then shuts off.

Specifications

Trip temperature: 300°F (open on rise)
Reset type: Manual reset button
Function: Flame rollout safety limit
Fits model: GDT115-5B furnace
OEM part number: B1370145
Brand: Goodman (genuine OEM)

OEM vs. Generic

Our genuine Goodman OEM switch is calibrated to the exact 300°F trip point specified by the manufacturer, ensuring proper safety response and a guaranteed drop-in fit. Aftermarket generics may vary in trip tolerance and mounting bracket geometry — with a safety-critical rollout switch, we strongly recommend OEM for reliable protection.

Installation Difficulty

Easy (1/5). Two-wire spade connection with a single mounting screw. Turn off power at the furnace before servicing. Typical replacement takes under 10 minutes for a homeowner comfortable with basic furnace maintenance.

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 300F Rollout Limit S...

$4.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GDT115-5B Furnace — B1370145?

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