What are the specs for this Limit Switch?

The correct replacement for Goodman model GMP100-4 — 20269903 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 GMP100-4 — 20269903.

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 Auxiliary Limit Auto-Reset Switch for GMP100-4 — 20269903

Name: OEM Goodman Auxiliary Limit Auto-Reset Switch for GMP100-4 — 20269903
Brand: Goodman
SKU: GOODMAN-11885
Price: 21.95 USD
Availability: InStock

SKU: GOODMAN-11885 Brand: Goodman

$21.95 $28.95

OEM Guaranteed

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30-Day Returns

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Texas CMBL #19328542014

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The Goodman 20269903 Auxiliary Limit Auto-Reset Switch is a genuine OEM high-limit safety control engineered for the Goodman GMP100-4 gas furnace. This thermally-activated switch monitors heat exchanger and plenum temperatures, interrupting the burner circuit if the furnace overheats and automatically restoring operation once safe temperatures return. It is a critical safety component required for proper and code-compliant furnace operation.

Specifications

Part Type: Auxiliary limit / high-limit safety switch
Reset Style: Automatic (self-resetting)
Fit: Goodman GMP100-4 and compatible furnace platforms
OEM Part Number: 20269903
Brand: Goodman (genuine OEM)

OEM vs. Generic

This is the factory OEM part, calibrated to Goodman's exact trip and reset temperature setpoints. Generic aftermarket limit switches often carry approximate temperature ratings that can cause nuisance shutdowns or, worse, fail to protect the heat exchanger. For a safety control, OEM calibration is strongly recommended.

Installation Difficulty

Easy (1 of 5). Two-screw mount with quarter-inch spade terminals. Always shut off gas and power before servicing. If you are unsure of correct placement, consult a licensed HVAC technician.

Compatible with your GMP100-4? Match the OEM part number 20269903 to your existing switch before ordering to guarantee an exact fit.

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 Auxiliary Limit Auto...

$21.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMP100-4 — 20269903?

Yes. This is the factory-specified OEM limit switch for the Goodman GMP100-4 — 20269903. 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 GMP100-4 — 20269903?

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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