What are the specs for this Limit Switch?

The correct replacement for Goodman model AMS951155DXAB — 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 AMS951155DXAB — 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 AMS951155DXAB — 20162906

Name: OEM Goodman M4 Primary Limit Switch for AMS951155DXAB — 20162906
Brand: Goodman
SKU: GOODMAN-7408
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-7408 Brand: Goodman

$9.95 $12.95

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The Goodman 20162906 M4 Primary Limit Switch is the genuine OEM high-limit control for the AMS951155DXAB and matching Goodman/Amana 95% single-stage furnaces. Mounted on the heat-exchanger bulkhead, the primary limit continuously monitors supply-air temperature and opens the gas/blower circuit if the furnace runs too hot — protecting the heat exchanger from cracking due to restricted airflow or a stuck blower. The "M4" designation reflects its calibrated trip temperature for this furnace platform.

Specifications

Type: Primary (main) high-limit switch — M4 series
Function: Supply-air overheat protection
OEM Part Number: 20162906
Fits: Goodman & Amana AMS951155DXAB and compatible 95% furnaces
Application: Gas furnace heat-exchanger limit control

OEM vs. Generic

Primary limits are matched to a specific trip temperature and mounting footprint. The genuine 20162906 guarantees the correct M4 set point and bracket fit; a generic limit with the wrong threshold can cause nuisance lockouts or leave the heat exchanger unprotected. Always replace with OEM.

Installation Difficulty

Easy (2/5) — Two screws and two spade terminals on the burner/heat-exchanger panel. De-energize the furnace first. If the old limit was tripping, verify filter, blower speed, and duct airflow before returning 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 Limit Swi...

$9.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman AMS951155DXAB — 20162906?

Yes. This is the factory-specified OEM limit switch for the Goodman AMS951155DXAB — 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 AMS951155DXAB — 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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