What are the specs for this Limit Switch?

The correct replacement for Goodman model AMSS920803BNAA — 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 AMSS920803BNAA — 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 High-Limit Switch for AMSS920803BNAA — 20162906

Name: OEM Goodman M4 Primary High-Limit Switch for AMSS920803BNAA — 20162906
Brand: Goodman
SKU: GOODMAN-7447
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-7447 Brand: Goodman

$9.95 $12.95

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The Goodman 20162906 M4 Primary Limit Switch is the genuine OEM high-temperature limit control for the Amana/Goodman AMSS920803BNAA gas furnace. Positioned in the heat-exchanger / supply-air path, this primary limit continuously monitors plenum temperature and de-energizes the gas valve if the furnace overheats — the most common cause being restricted airflow from a dirty filter, closed registers, or a failing blower. It is an auto-reset device that re-closes once temperature returns to normal.

Specifications

Part type: Primary high-limit (auto-reset) switch
Series: M4 disc limit
Action: Normally closed, opens on overtemperature
Reset: Automatic on cooldown
Fitment: Amana & Goodman furnaces (AMSS920803BNAA and related)
OEM part number: 20162906

OEM vs. Generic

The OEM 20162906 ships with the correct disc trip point, insertion depth, and mounting-plate cutout for this furnace. A generic disc limit with the wrong open temperature will either short-cycle the furnace on heat or fail to protect the heat exchanger. For the primary safety limit, matching the OEM part number is strongly advised.

Install Difficulty

Moderate (2/5). Disconnect power, remove the two mounting screws, transfer the wire leads, and reinstall so the sensing disc sits in the airstream at the original depth. If the new limit keeps opening, correct the airflow restriction before returning the unit 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 M4 Primary High-Limi...

$9.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMSS920803BNAA — 20162906?

Yes. This is the factory-specified OEM limit switch for the Goodman AMSS920803BNAA — 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 AMSS920803BNAA — 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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