What are the specs for this Limit Switch?

The correct replacement for Goodman model GUN100-4B — 1370908S 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 GUN100-4B — 1370908S.

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 160°F Limit Switch 7-inch for GUN100-4B — 1370908S

Name: OEM Goodman 160°F Limit Switch 7-inch for GUN100-4B — 1370908S
Brand: Goodman
SKU: GOODMAN-13154
Price: 26.95 USD
Availability: InStock

SKU: GOODMAN-13154 Brand: Goodman

$26.95 $35.95

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The Goodman 1370908S Limit Switch is a genuine OEM high-limit safety control for the GUN100-4B gas furnace and compatible GUN100 series units. This 160°F, 7-inch insertion-depth switch monitors the temperature in the heat exchanger / plenum and shuts off the burners if the furnace overheats — protecting the heat exchanger from cracking and preventing unsafe operation. A failed limit switch causes short-cycling, no-heat lockouts, or (if stuck closed) dangerous overheating.

Specifications

OEM Part Number: 1370908S
Trip Temperature: 160°F (auto-reset high-limit)
Insertion Length: 7 inches
Type: Bimetal high-limit temperature switch
Fits: Goodman GUN100-4B and GUN100 series furnaces

OEM vs. Generic

This Goodman OEM limit switch is matched to the exact trip temperature and probe length your furnace requires. A generic switch with the wrong length or set-point can nuisance-trip (short-cycling) or fail to protect the heat exchanger at the correct temperature. Because this is a safety control, the precise OEM specification matters — don't substitute a close-enough universal part.

Installation Difficulty

Easy (2/5). Disconnect power, remove the two mounting screws, unplug the two spade terminals, and slide the probe out. Install the replacement in the same orientation and depth. Verify normal cycling and confirm airflow is unrestricted before returning 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 160°F Limit Switch 7...

$26.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GUN100-4B — 1370908S?

Yes. This is the factory-specified OEM limit switch for the Goodman GUN100-4B — 1370908S. 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 GUN100-4B — 1370908S?

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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