What are the specs for this Limit Switch?

The correct replacement for Goodman model GCH90905DXAA — 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 GCH90905DXAA — 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 GCH90905DXAA — 20162906

Name: OEM Goodman M4 Primary Limit Switch for GCH90905DXAA — 20162906
Brand: Goodman
SKU: GOODMAN-9745
Price: 19.95 USD
Availability: InStock

SKU: GOODMAN-9745 Brand: Goodman

$19.95 $26.95

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Goodman 20162906 M4 Primary Limit Switch

The 20162906 is a genuine OEM primary high-limit switch engineered for the Goodman GCH90905DXAA gas furnace and compatible 90% AFUE models. This normally-closed thermal safety control monitors heat-exchanger and plenum temperature, opening the gas-valve circuit to shut the burner down if the furnace overheats — protecting the heat exchanger and your home from a dangerous over-temperature condition. A failed or drifting limit switch is a common cause of short-cycling, no-heat calls, and nuisance lockouts.

Specifications

Part number: 20162906 (M4 primary limit)
Type: Manual/auto-reset thermal high-limit switch
Contacts: Normally closed (opens on temperature rise)
Fits: Goodman GCH90905DXAA and compatible furnaces
Application: Gas furnace primary safety limit
Brand: Goodman OEM

OEM vs. Generic

Our OEM Goodman unit is calibrated to the exact factory trip temperature and mounting footprint, ensuring correct safety operation and preserving your equipment warranty. Aftermarket generic limits are lower cost but may trip at slightly different temperatures — acceptable for out-of-warranty budget repairs, but we recommend OEM for a safety-critical control like this.

Install Difficulty

Easy (2/5). Remove power, disconnect two spade terminals, unscrew the mounting bracket, and reverse to install. Typical replacement time is 15–20 minutes for a homeowner comfortable with basic tools. Always disconnect power at the breaker before servicing.

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...

$19.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GCH90905DXAA — 20162906?

Yes. This is the factory-specified OEM limit switch for the Goodman GCH90905DXAA — 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 GCH90905DXAA — 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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