What are the specs for this Limit Switch?

The correct replacement for Goodman model AMEC800805DXAA — 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 AMEC800805DXAA — 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 Control for AMEC800805DXAA — 20162904

Name: OEM Goodman Primary Limit Control for AMEC800805DXAA — 20162904
Brand: Goodman
SKU: GOODMAN-3969
Price: 54.95 USD
Availability: InStock

SKU: GOODMAN-3969 Brand: Goodman

$54.95 $72.95

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The Goodman 20162904 Primary Limit Temperature Control is a genuine OEM safety control for the AMEC800805DXAA gas furnace and compatible Goodman/Amana models. Mounted on the heat exchanger / plenum, this primary high-limit senses supply-air temperature and interrupts the burner circuit if the furnace overheats — typically from restricted airflow, a dirty filter, or a failing blower. As an auto-reset control, it closes again once temperatures return to normal, cycling the furnace off and on to keep the heat exchanger within safe limits.

Specifications

Part type: Primary limit temperature control (auto-reset high-limit)
OEM part number: 20162904
Action: Normally closed, opens on overtemperature, auto-reset
Function: Supply-air / heat-exchanger overheat protection
Fits: AMEC800805DXAA and related Goodman/Amana furnaces

OEM vs. Generic

The primary limit is factory-matched to the furnace's cabinet geometry and trip temperature. Because it directly protects the heat exchanger and occupants, we recommend the genuine OEM control — a generic substitute with a different set point can cause short-cycling or fail to protect against a cracked heat exchanger condition.

Installation Difficulty

Moderate (2.5/5). Power off the furnace, disconnect the wire leads, remove the mounting screws, and install the new control in the same orientation. 15-20 minutes with a nut driver. Correct any underlying airflow restriction before returning the furnace 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 Primary Limit Contro...

$54.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMEC800805DXAA — 20162904?

Yes. This is the factory-specified OEM limit switch for the Goodman AMEC800805DXAA — 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 AMEC800805DXAA — 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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