What are the specs for this Limit Switch?

The correct replacement for Goodman model AMEC800403ANAB — 20162906 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 AMEC800403ANAB — 20162906.

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 M4 Primary Limit Switch for AMEC800403ANAB — 20162906

Name: OEM Goodman M4 Primary Limit Switch for AMEC800403ANAB — 20162906
Brand: Goodman
SKU: GOODMAN-3776
Price: 18.95 USD
Availability: InStock

SKU: GOODMAN-3776 Brand: Goodman

$18.95 $24.95

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The Goodman 20162906 M4 Primary Limit Switch is the factory OEM high-limit safety control for AMEC800403ANAB furnaces and compatible Goodman/Amana equipment. The primary limit monitors heat-exchanger temperature and opens the circuit to shut down the burners if the furnace overheats — protecting the heat exchanger and your home. A failed limit switch is a frequent cause of short-cycling and no-heat calls.

Specifications

OEM Part Number: 20162906
Type: M4 Primary High-Limit Switch
Function: Overheat protection / burner cutout
Part Category: Limit Switch
Fits: AMEC800403ANAB and compatible Goodman/Amana furnaces

OEM vs. Generic

This OEM switch is calibrated to your furnace's factory trip temperature. Generic limits with the wrong set point can nuisance-trip (causing short cycling) or, worse, fail to trip when needed. Because this is a safety control, we recommend the OEM part.

Installation Difficulty

Easy to Moderate — the switch is typically secured with two screws and spade terminals. Cut power at the breaker before servicing, photograph the wiring, and confirm the replacement is oriented the same way. If the switch keeps tripping after replacement, investigate airflow (dirty filter, blocked vents) before assuming a parts fault.

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 M4 Primary Limit Swi...

$18.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMEC800403ANAB — 20162906?

Yes. This is the factory-specified OEM limit switch for the Goodman AMEC800403ANAB — 20162906. 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 AMEC800403ANAB — 20162906?

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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