What are the specs for this Limit Switch?

The correct replacement for Goodman model ACEC961005CNAB — 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 ACEC961005CNAB — 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 ACEC961005CNAB — 20162906

Name: OEM Goodman M4 Primary High-Limit Switch for ACEC961005CNAB — 20162906
Brand: Goodman
SKU: GOODMAN-20162906
Price: 14.95 USD
Availability: InStock

SKU: GOODMAN-20162906 Brand: Goodman

$14.95 $20.18

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The Goodman 20162906 M4 Primary High-Limit Switch is a genuine OEM auto-reset safety control for the ACEC961005CNAB gas furnace. Mounted on the heat-exchanger / supply-air section, it continuously monitors temperature and shuts off the burners if the furnace overheats — protecting the heat exchanger and the home. A failed limit switch is a common cause of short cycling or a furnace that won't fire.

Specifications

Part type: Primary high-limit switch (M4 series)
Function: Temperature-actuated, automatic reset
Configuration: Normally closed, opens on rise
Mount: OEM bracket / disc style
Brand: Goodman OEM
OEM part number: 20162906
Compatible model: ACEC961005CNAB

OEM vs. Generic

The OEM 20162906 is calibrated to the exact open/close temperature set point Goodman specifies for this cabinet and airflow design. Generic limit switches with the wrong trip temperature can either nuisance-trip or fail to protect the heat exchanger. For a safety control, the genuine OEM part is strongly recommended.

Install Difficulty

Rating: Easy–Moderate (2/5). Disconnect power, remove the two mounting screws, transfer the spade connectors to the new switch, and re-seat it in the original location. Confirm correct orientation against the heat-exchanger surface. Takes about 10–15 minutes for a confident DIYer; consult a technician if unsure.

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...

$14.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman ACEC961005CNAB — 20162906?

Yes. This is the factory-specified OEM limit switch for the Goodman ACEC961005CNAB — 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 ACEC961005CNAB — 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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