What are the specs for this Limit Switch?

The correct replacement for Goodman model OEM Goodman 240°F 3 in Primary Limit Switch GDT090-4A — 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 OEM Goodman 240°F 3 in Primary Limit Switch GDT090-4A — 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 3 in Primary Limit Switch GDT090-4A — 1370903S

Name: OEM Goodman 240°F 3 in Primary Limit Switch GDT090-4A — 1370903S
Brand: Goodman
SKU: GOODMAN-10458
Price: 29.95 USD
Availability: InStock

SKU: GOODMAN-10458 Brand: Goodman

$29.95 $38.95

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The Goodman 1370903S is a genuine OEM primary limit switch rated at 240°F with a 3 in insertion depth, built for GDT090-4A gas furnaces. Mounted on the heat-exchanger plenum, this auto-reset high-limit control opens the circuit if supply-air temperature climbs too high — protecting the heat exchanger from overheating due to low airflow, a dirty filter, or blower failure.

Specifications

Trip temperature: 240°F (opens on rise)
Insertion depth: 3 in probe
Reset: Automatic (closes on cool-down)
Function: Primary high-limit safety
Fits: Goodman GDT090-4A furnace
OEM Part Number: 1370903S

OEM vs. Generic

The OEM 1370903S matches the precise 240°F set point and 3 in probe length calibrated to this furnace's plenum, so the disc sits at the correct sensing depth. A generic with the wrong length or temperature can nuisance-trip on every heat call or fail to protect the heat exchanger. For high-limit safety controls, OEM is strongly recommended.

Installation Difficulty

Easy — two mounting screws and two spade terminals, roughly 15–20 minutes. Power off at the disconnect before starting. If the original tripped, correct the underlying airflow restriction before running the furnace again.

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 3 in Primary L...

$29.95

Frequently Asked Questions

Does this Limit Switch fit my Goodman OEM Goodman 240°F 3 in Primary Limit Switch GDT090-4A — 1370903S?

Yes. This is the factory-specified OEM limit switch for the Goodman OEM Goodman 240°F 3 in Primary Limit Switch GDT090-4A — 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 OEM Goodman 240°F 3 in Primary Limit Switch GDT090-4A — 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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