What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80805CNAA — 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 AMH80805CNAA — 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 AMH80805CNAA — 20162906

Name: OEM Goodman M4 Primary Limit Switch for AMH80805CNAA — 20162906
Brand: Goodman
SKU: GOODMAN-5605
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-5605 Brand: Goodman

$9.95 $12.95

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Goodman 20162906 M4 Primary Limit Switch

The Goodman 20162906 is the OEM M4 primary (high) limit switch engineered for the Amana AMH80805CNAA gas furnace and compatible Goodman/Amana models. This normally-closed thermal safety control opens the burner circuit if the heat exchanger temperature climbs beyond its rated set point, protecting your furnace from overheating caused by restricted airflow, a dirty filter, or a failed blower.

Specifications

Type: Primary high-limit safety switch (M4 series)
Action: Auto-reset, normally closed (opens on temperature rise)
Application: Gas-fired warm-air furnaces
Fit: Direct OEM replacement for AMH80805CNAA
OEM Part Number: 20162906
Brand: Goodman / Amana

OEM vs. Generic

The genuine OEM 20162906 is calibrated to the exact trip temperature your furnace's control board and heat exchanger were designed around. Generic aftermarket limit switches may look similar but can differ in set-point tolerance, mounting bracket, and terminal placement — leading to nuisance lockouts or a switch that trips too late. For a safety-critical component, we recommend the OEM part.

Installation Difficulty

Easy (2/5). A 10–20 minute repair for most homeowners: shut off power and gas, remove the two mounting screws, transfer the spade connectors, and reinstall. Always confirm root-cause airflow issues before replacing a tripped limit. If unsure, consult a licensed HVAC technician.

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...

$9.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMH80805CNAA — 20162906?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80805CNAA — 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 AMH80805CNAA — 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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