What are the specs for this Limit Switch?

The correct replacement for Goodman model AMSS921004CNAA — 10123539 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 AMSS921004CNAA — 10123539.

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 Manual Reset Limit Switch for AMSS921004CNAA — 10123539

Name: OEM Goodman Manual Reset Limit Switch for AMSS921004CNAA — 10123539
Brand: Goodman
SKU: GOODMAN-7479
Price: 6.95 USD
Availability: InStock

SKU: GOODMAN-7479 Brand: Goodman

$6.95 $8.99

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The Goodman 10123539 Manual Reset Limit Switch is a genuine OEM safety control for the Goodman/Amana AMSS921004CNAA gas furnace. This high-limit switch monitors heat-exchanger temperature and cuts power to the gas valve if the furnace overheats, protecting the unit and your home. Because it is a manual reset device, it must be pressed to restore operation after a trip — an intentional safety feature that flags a persistent airflow or overheat problem.

Specifications

Part type: Manual reset high-limit / rollout safety switch
Reset type: Manual (push-button)
OEM part number: 10123539
Brand: Goodman / Amana
Compatible model: AMSS921004CNAA (and select Goodman/Amana furnaces)
Function: Overheat / thermal cutoff protection

OEM vs. Generic

As a safety-critical control, the genuine OEM 10123539 is calibrated to the exact trip temperature your furnace requires. A generic switch with a different set-point can nuisance-trip or, worse, fail to trip when needed. For any limit or rollout switch, always use the OEM part.

Installation Difficulty

Moderate (3/5). Requires disconnecting furnace power, removing the two mounting screws, and transferring the wire terminals. Basic electrical familiarity recommended; if you are unsure why the original switch tripped, have a licensed HVAC technician diagnose the underlying cause before replacing.

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 Manual Reset Limit S...

$6.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMSS921004CNAA — 10123539?

Yes. This is the factory-specified OEM limit switch for the Goodman AMSS921004CNAA — 10123539. 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 AMSS921004CNAA — 10123539?

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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