What are the specs for this Limit Switch?

The correct replacement for Goodman model ACSS921005CNAA — 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 ACSS921005CNAA — 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 High-Limit Switch for ACSS921005CNAA — 10123539

Name: OEM Goodman Manual Reset High-Limit Switch for ACSS921005CNAA — 10123539
Brand: Goodman
SKU: GOODMAN-2389
Price: 11.95 USD
Availability: InStock

SKU: GOODMAN-2389 Brand: Goodman

$11.95 $16.13

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The Goodman 10123539 Manual Reset Limit Switch is a genuine OEM safety control for the ACSS921005CNAA gas furnace and compatible Goodman/Amana models. This high-limit / rollout switch monitors heat-exchanger or burner-area temperature and cuts power to the gas valve if the furnace overheats — protecting against cracked heat exchangers, blocked airflow, and flame rollout. Because it is a manual reset device, it must be pressed to restore operation once a fault has been corrected, alerting the homeowner that a real problem occurred.

Specifications

OEM Part Number: 10123539
Brand: Goodman (genuine OEM)
Component Type: Manual reset high-limit / rollout safety switch
Function: Opens on over-temperature to de-energize the gas valve
Reset: Manual (push-button)
Equipment: Furnace
Primary Fit: ACSS921005CNAA (verify the temperature rating stamped on your original switch)

OEM vs. Generic

The genuine Goodman switch is calibrated to the exact trip temperature specified for this furnace's heat exchanger and burner geometry. Generic limit switches with the wrong trip point can allow dangerous overheating or cause repeated nuisance lockouts. As a life-safety component, an exact-match OEM part is strongly recommended and protects your warranty.

Installation Difficulty

Moderate (3/5). Requires removing the burner/control panel, disconnecting two spade terminals, and unscrewing the switch from its bracket. Shut off all power and gas before servicing, and never bypass a safety switch. If your switch keeps tripping after replacement, have a licensed HVAC technician diagnose the underlying overheating cause.

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 High-Li...

$11.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman ACSS921005CNAA — 10123539?

Yes. This is the factory-specified OEM limit switch for the Goodman ACSS921005CNAA — 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 ACSS921005CNAA — 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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