What are the specs for this Limit Switch?

The correct replacement for Goodman model GUN125-5B — 1370906S 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 GUN125-5B — 1370906S.

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 150°F 7 in Limit Switch for GUN125-5B — 1370906S

Name: OEM Goodman 150°F 7 in Limit Switch for GUN125-5B — 1370906S
Brand: Goodman
SKU: GOODMAN-1370906S
Price: 26.20 USD
Availability: InStock

SKU: GOODMAN-1370906S Brand: Goodman

$26.20 $34.95

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Goodman 1370906S High-Limit Switch (150°F, 7")

The Goodman 1370906S is a genuine OEM high-limit safety switch for the GUN125-5B gas furnace. Mounted on the heat exchanger, it opens the burner circuit if supply air exceeds its 150°F trip point, protecting the furnace and ductwork from overheating caused by dirty filters, blocked returns, or blower failure. A limit switch that has tripped permanently or drifted out of calibration will cause short-cycling or no-heat calls.

Specifications

OEM Part Number: 1370906S
Trip Temperature: 150°F (open on rise, auto-reset)
Probe Length: 7 inches
Type: High-limit safety switch
Compatibility: Goodman GUN125-5B furnace

OEM vs. Generic

The OEM 1370906S is factory-calibrated to the exact 150°F set point and 7-inch insertion depth this furnace requires. Generic limits with the wrong temperature rating or probe length can nuisance-trip or, worse, fail to protect the heat exchanger. Genuine Goodman ensures the safety circuit behaves exactly as engineered.

Installation Difficulty

Easy. Two mounting screws and two spade terminals. Shut off power, note wire positions, swap the switch, and restore. A simple DIY-friendly repair for anyone comfortable working inside the furnace cabinet.

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 150°F 7 in Limit Swi...

$26.20

Frequently Asked Questions

Does this Limit Switch fit my Goodman GUN125-5B — 1370906S?

Yes. This is the factory-specified OEM limit switch for the Goodman GUN125-5B — 1370906S. 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 GUN125-5B — 1370906S?

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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