What are the specs for this Limit Switch?

The correct replacement for Goodman model AMES921205DNAA — 20162904 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 AMES921205DNAA — 20162904.

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 Primary Limit Temperature Control for AMES921205DNAA — 20162904

Name: OEM Goodman Primary Limit Temperature Control for AMES921205DNAA — 20162904
Brand: Goodman
SKU: GOODMAN-4776
Price: 35.95 USD
Availability: InStock

SKU: GOODMAN-4776 Brand: Goodman

$35.95 $46.95

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The Goodman 20162904 Primary Limit Temperature Control is the genuine OEM high-limit safety switch for the AMES921205DNAA gas furnace. Mounted on the heat exchanger or blower deck, this control continuously monitors supply-air temperature and opens the ignition circuit if the furnace overheats — protecting the heat exchanger from cracking and preventing a dangerous overheat condition. If your furnace short-cycles, locks out on high limit, or the burners shut off prematurely, a failed primary limit is a common cause.

Specifications

OEM Part Number: 20162904
Type: Primary high-limit temperature control (auto-reset)
Function: Overheat safety cutout for the heating circuit
Compatible Model: AMES921205DNAA (Goodman/Amana 92% gas furnace)
Fit: Direct OEM replacement

OEM vs. Generic

Limit controls are calibrated to open and close at furnace-specific temperature setpoints. The genuine 20162904 carries Goodman's exact trip and reset temperatures, so the furnace's safety response matches factory design. Generic limits with the wrong setpoint can nuisance-trip or, worse, fail to cut off at a safe temperature. For a safety device, the OEM part is the right choice.

Installation Difficulty

Moderate — the limit is secured by a mounting bracket and two wire terminals. Basic hand tools are required. Shut off gas and power at the disconnect before servicing, and confirm terminal orientation before removing wires. A licensed HVAC technician should verify operation after replacement.

Have your model and serial ready and email info@nationalhvacparts.com if you need help confirming fit.

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 Primary Limit Temper...

$35.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMES921205DNAA — 20162904?

Yes. This is the factory-specified OEM limit switch for the Goodman AMES921205DNAA — 20162904. 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 AMES921205DNAA — 20162904?

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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