What are the specs for this Limit Switch?

The correct replacement for Goodman model AMH80805CXAA — 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 AMH80805CXAA — 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 AMH80805CXAA — 20162906

Name: OEM Goodman M4 Primary Limit Switch for AMH80805CXAA — 20162906
Brand: Goodman
SKU: GOODMAN-5647
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-5647 Brand: Goodman

$9.95 $12.99

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Texas CMBL #19328542014

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The Goodman 20162906 M4 Primary Limit Switch is a genuine OEM high-limit safety control for the Amana/Goodman AMH80805CXAA gas furnace. Mounted on the heat-exchanger bulkhead, this primary limit continuously monitors supply-air temperature. If the furnace overheats — commonly from a dirty filter, blocked ductwork, or a failed blower — the switch opens to shut down the gas valve and protect the heat exchanger from cracking. It is a snap-disc, auto-reset device that re-closes once temperatures return to a safe range.

Specifications

Type: M4 primary high-limit switch
Function: Normally-closed, opens on over-temperature
Reset: Automatic (snap-disc)
Terminals: 1/4" quick-connect spade
Fits: Goodman & Amana gas furnaces including AMH80805CXAA
OEM Part Number: 20162906

OEM vs. Generic

The OEM 20162906 carries the exact cut-out temperature and mounting footprint Goodman specified for the AMH80805CXAA. Substituting a universal limit with a different trip point or L-number can cause nuisance shutdowns or, worse, allow the furnace to over-fire. For a life-safety control, the genuine part is the right call.

Installation Difficulty

Easy (1/5). Typically two mounting screws and two spade connectors — most DIYers finish in about 10 minutes. Turn off power and gas, let the furnace cool, and match the wire terminals before removing the old switch.

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 AMH80805CXAA — 20162906?

Yes. This is the factory-specified OEM limit switch for the Goodman AMH80805CXAA — 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 AMH80805CXAA — 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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