What are the specs for this Limit Switch?

The correct replacement for Goodman model GUPX075-4B — 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 GUPX075-4B — 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 GUPX075-4B — B1370108

Name: OEM Goodman 300°F Flame Rollout Switch for GUPX075-4B — B1370108
Brand: Goodman
SKU: GOODMAN-13321
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-13321 Brand: Goodman

$4.95 $6.49

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The Goodman B1370108 is a genuine OEM flame rollout switch rated to 300°F for the GUPX075-4B gas furnace. This safety limit sits near the burner assembly and instantly cuts power to the gas valve if flame rolls out of the combustion chamber — a critical protection against a blocked heat exchanger, restricted flue, or failing inducer. When it trips repeatedly it is warning you of a real combustion problem, so diagnose the root cause before resetting.

Trip temperature: 300°F (open on rise)
Reset: Manual reset button
Function: Normally-closed flame rollout safety limit
Fits: Goodman GUPX075-4B burner assembly
OEM Part #: B1370108

OEM vs. Generic: The OEM Goodman switch is calibrated to the exact 300°F trip point and bracket geometry specified for this furnace, which matters on a safety device. Our generic-equivalent option carries the same trip rating and terminal style at a lower price for out-of-warranty repairs. For any flame-safety component we recommend OEM whenever possible.

Install difficulty: Easy (1 of 5). Disconnect furnace power, unplug the two spade terminals, remove the mounting screw(s), swap in the new switch on the same bracket, and reconnect. No calibration is required. If the new switch trips again on startup, stop and have the heat exchanger and venting inspected by a licensed technician.

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 GUPX075-4B — B1370108?

Yes. This is the factory-specified OEM limit switch for the Goodman GUPX075-4B — 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 GUPX075-4B — 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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OEM Goodman 300°F Flame Rollout Switch for GUPX075-4B — B1370108

Shipping Information

Return Policy

Frequently Asked Questions