What are the specs for this Limit Switch?

The correct replacement for Goodman model GMP100-5 — 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 GMP100-5 — 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 GMP100-5 — 20269903

Name: OEM Goodman Auxiliary Limit Auto-Reset Switch for GMP100-5 — 20269903
Brand: Goodman
SKU: GOODMAN-11890
Price: 10.95 USD
Availability: InStock

SKU: GOODMAN-11890 Brand: Goodman

$10.95 $13.95

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The genuine OEM Goodman 20269903 Auxiliary Limit Auto-Reset Switch is a factory safety high-limit control designed for the Goodman GMP100-5 gas furnace and compatible Amana models. This normally-closed thermal switch monitors heat-exchanger and cabinet temperatures, opening the circuit to shut down the burners if the furnace overheats, then automatically resetting once temperatures return to a safe range — no manual intervention required.

Specifications

Part number: 20269903
Type: Auxiliary auto-reset limit / high-limit switch
Function: Normally-closed thermal safety cutout
Reset: Automatic
Fits: Goodman GMP100-5 and compatible Goodman/Amana furnaces
Genuine OEM Goodman replacement

OEM vs. Generic

Genuine OEM Goodman switches are calibrated to the exact trip and reset temperatures specified for your furnace, protecting the heat exchanger and preserving your equipment warranty. Aftermarket "universal" limit switches may trip at incorrect setpoints, causing nuisance shutdowns or, worse, failing to protect against overheating. For a safety-critical control, OEM is the recommended choice.

Installation Difficulty

Easy to Moderate. A competent DIYer can swap this part in 15–20 minutes with basic hand tools. Always disconnect power at the furnace before servicing. If you are unsure about wiring or the cause of repeated limit trips, consult a licensed HVAC technician, as recurring high-limit faults often indicate airflow problems.

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...

$10.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMP100-5 — 20269903?

Yes. This is the factory-specified OEM limit switch for the Goodman GMP100-5 — 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 GMP100-5 — 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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