What are the specs for this Limit Switch?

The correct replacement for Goodman model GDT070-3B — 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 GDT070-3B — 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 GDT070-3B — B1370145

Name: OEM Goodman 300°F Rollout Limit Switch for GDT070-3B — B1370145
Brand: Goodman
SKU: GOODMAN-10436
Price: 16.95 USD
Availability: InStock

SKU: GOODMAN-10436 Brand: Goodman

$16.95 $22.95

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Goodman B1370145 Flame Rollout Switch (300°F)

The Goodman B1370145 is the factory rollout limit switch for the GDT070-3B gas furnace. Mounted on the burner assembly, it detects dangerous flame rollout — flames escaping the combustion chamber due to a blocked flue, cracked heat exchanger, or poor combustion airflow — and instantly de-energizes the gas valve to prevent fire and carbon-monoxide hazards. This is one of the most important safety devices in the furnace.

Specifications

Part Number: B1370145
Type: Flame rollout limit switch
Trip Temperature: 300°F (manual reset)
Fits Model: Goodman GDT070-3B furnace
Function: Combustion rollout / gas-valve cutout
Equipment: Gas furnace

OEM vs. Generic

This is a genuine OEM Goodman rollout switch matched to the 300°F trip point and manual-reset design your furnace requires. Because rollout protection is life-safety related, we strongly discourage substituting a generic switch with an unverified set point. The OEM part guarantees the correct calibration and mounting geometry.

Installation Difficulty

Rating: Easy (1/5). Turn off gas and electrical power, disconnect the two spade terminals, remove the mounting screws, and install the replacement in the identical position on the burner box. Reconnect and restore power. Important: if the original switch tripped, do not simply reset and ignore it — a rollout event signals a real combustion problem. Have a licensed technician inspect the heat exchanger, flue, and burners before returning the furnace to service.

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 ...

$16.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GDT070-3B — B1370145?

Yes. This is the factory-specified OEM limit switch for the Goodman GDT070-3B — 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 GDT070-3B — 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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