What are the specs for this Limit Switch?

The correct replacement for Goodman model GMPH050-3 — 1370903S 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 GMPH050-3 — 1370903S.

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 240°F 3in Primary Limit Switch for GMPH050-3 — 1370903S

Name: OEM Goodman 240°F 3in Primary Limit Switch for GMPH050-3 — 1370903S
Brand: Goodman
SKU: GOODMAN-12015
Price: 29.95 USD
Availability: InStock

SKU: GOODMAN-12015 Brand: Goodman

$29.95 $38.95

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Goodman 1370903S Primary Limit Switch

The Goodman 1370903S is a genuine OEM primary high-limit switch engineered for the GMPH050-3 gas furnace and other compatible Goodman/Amana models. This safety control opens the burner circuit if the heat exchanger temperature exceeds its 240°F trip point, protecting the furnace from overheating and preventing cracked heat exchangers, tripped breakers, and unsafe operation. A properly functioning limit switch is critical for safe, reliable heating.

Specifications

Part Number: 1370903S
Trip Temperature: 240°F (auto-reset)
Insertion Depth: 3 inches
Type: Primary high-limit switch
Fits: Goodman GMPH050-3 gas furnace
Mount: 2-hole flange, spade terminals

OEM vs. Generic

This OEM Goodman switch is calibrated to the exact factory trip point and dimensions, guaranteeing correct fit and safety response. Generic aftermarket limits may vary in calibration and insertion depth, risking nuisance trips or delayed shutoff. For a safety component, factory-spec is strongly recommended.

Installation Difficulty

Easy — Typically a 15-minute job. Disconnect power, remove two mounting screws, transfer the spade connectors, and reinstall. No special tools required beyond a nut driver.

Always disconnect power before servicing. If unsure, consult a licensed HVAC technician.

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 240°F 3in Primary Li...

$29.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman GMPH050-3 — 1370903S?

Yes. This is the factory-specified OEM limit switch for the Goodman GMPH050-3 — 1370903S. 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 GMPH050-3 — 1370903S?

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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