What are the specs for this Limit Switch?

The correct replacement for Goodman model GUN040-2 — B1370108 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 GUN040-2 — B1370108.

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 Flame Rollout Switch for GUN040-2 — B1370108

Name: OEM Goodman 300°F Flame Rollout Switch for GUN040-2 — B1370108
Brand: Goodman
SKU: GOODMAN-13109
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-13109 Brand: Goodman

$4.95 $6.50

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Texas CMBL #19328542014

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The genuine Goodman B1370108 Flame Rollout Switch is a 300°F manual-reset safety limit for the GUN040-2 furnace. Mounted at the burner box, it trips and shuts off the gas valve if flames roll out of the burners due to a blocked heat exchanger or restricted venting — protecting the cabinet, wiring, and homeowner from fire.

Specifications

Trip temperature: 300°F
Type: Manual-reset flame rollout limit switch
Function: Burner-box safety cutout, opens on rollout
Fits Goodman GUN040-2 furnace
OEM part number: B1370108

OEM vs. Generic

The OEM Goodman switch guarantees the exact 300°F trip point and bracket fitment. Our generic equivalent meets the same temperature rating and terminal spacing for economical safety-part replacement.

Install Difficulty

Easy (2/5). Two spade terminals and a single mounting screw. Important: a tripped rollout switch signals a serious combustion or heat-exchanger problem — have the furnace inspected by a licensed technician before returning it 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 Flame Rollout ...

$4.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GUN040-2 — B1370108?

Yes. This is the factory-specified OEM limit switch for the Goodman GUN040-2 — B1370108. 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 GUN040-2 — B1370108?

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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