What are the specs for this Limit Switch?

The correct replacement for Goodman model AMEC800805DXAB — 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 AMEC800805DXAB — 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 AMEC800805DXAB — 20162904

Name: OEM Goodman Primary Limit Temperature Control for AMEC800805DXAB — 20162904
Brand: Goodman
SKU: GOODMAN-3978
Price: 54.95 USD
Availability: InStock

SKU: GOODMAN-3978 Brand: Goodman

$54.95 $71.95

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The Goodman 20162904 Primary Limit Temperature Control is a genuine OEM safety control for AMEC800805DXAB gas furnaces. The primary limit continuously senses supply-air temperature and de-energizes the gas valve if the heat exchanger exceeds its safe operating range — commonly triggered by a dirty filter, blower fault, or restricted ductwork. A drifting or failed limit control leads to intermittent no-heat calls and short cycling.

Specifications

Type: Primary high-limit temperature control (auto-reset)
Function: Supply-air over-temperature protection
Sensing: Factory-calibrated trip set point
Mount: Vestibule / heat-exchanger bracket (match original)
Compatibility: Amana/Goodman AMEC800805DXAB furnace
OEM Part Number: 20162904

OEM vs. Generic

As a primary safety device, the OEM Goodman control carries the exact temperature calibration and probe length your furnace requires. Generic substitutes with different set points or probe geometry can compromise protection or cause frequent lockouts. OEM is strongly recommended for this component.

Installation Difficulty

Moderate — Power off the unit, note wire orientation, unplug terminals, remove mounting screws, and install the new control with the sensing element positioned correctly in the airstream. About 25–40 minutes. Resolve any airflow restriction first.

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...

$54.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMEC800805DXAB — 20162904?

Yes. This is the factory-specified OEM limit switch for the Goodman AMEC800805DXAB — 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 AMEC800805DXAB — 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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