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SWT01280 Trane Thermal Limit Switch CUT OUT 155°F Direct Replacement

SWT01280 Trane Thermal Limit Switch CUT OUT 155°F Direct Replacement

Low stock: 5 left

Regular price $73.29 USD
Regular price Sale price $73.29 USD
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Quick Feature Highlights

  • Genuine OEM Replacement for Trane & American Standard systems.

  • 155°F Safety Trip point for overheat protection.

  • Auto-Reset at 125°F for seamless operation.

  • High Amperage rating: 5.8 FLA @ 120V AC.

  • Direct Replacement for part numbers C340056P18 and SWT1280.

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Specifications

Product Details & Specification

  • Brand: Trane / American Standard
  • Part Number: SWT01280
  • Description: Thermal Limit Switch
  • Open Temperature (Cut Out): 155°F
  • Close Temperature (Cut In): 125°F
  • Insert Length: Surface/Board Mount Design
  • Electrical Rating: 5.8 FLA / 34.8 LRA @ 120V AC
  • Terminal Type: Quick Connect
  • Number of Poles: 1
  • Shipping Weight: 1.5 lbs

description

Trane / American Standard SWT01280 Genuine OEM Furnace Limit Switch (155°F / L155-30F Rating)


The Trane / American Standard SWT01280 is a high-limit thermal safety device engineered for HVAC furnaces and other heating equipment. This is a Genuine OEM part designed to prevent system overheating by functioning as a critical safety shut-off. The switch continuously monitors the heat exchanger temperature and is precisely calibrated to "open" the electrical circuit at 155°F. This action cuts power to the heating element (gas valve) to prevent damage. Once the temperature decreases to 125°F, the switch automatically "closes" the circuit, allowing the system to operate normally and safely.


Key Features

  • Precision Thermal Safety: Calibrated to "Open" the circuit at 155°F, providing immediate shutdown to protect critical furnace components.
  • Automatic Reset: The switch automatically "Closes" at 125°F, allowing the heating system to restart automatically once safe temperatures are restored (30°F differential).
  • High Amperage Rating: Rated for robust electrical loads (5.8 FLA @ 120V AC), ensuring reliability in various residential and light commercial applications.
  • Genuine OEM Component: Ensures exact fitment and adherence to strict Trane and American Standard safety and performance specifications.


Product Details & Specification

  • Brand: Trane / American Standard
  • Part Number: SWT01280
  • Description: Thermal Limit Switch
  • Open Temperature (Cut Out): 155°F
  • Close Temperature (Cut In): 125°F
  • Insert Length: Surface/Board Mount Design
  • Electrical Rating: 5.8 FLA / 34.8 LRA @ 120V AC
  • Terminal Type: Quick Connect
  • Number of Poles: 1
  • Shipping Weight: 1.5 lbs


🛠️ HVAC Depot Pro Tip

A limit switch with an L155-30F rating is a standard high-limit for many 80% and 90%+ efficiency furnaces. If this switch is consistently tripping, the most probable cause is insufficient airflow. Check for an excessively dirty air filter, blocked return air ducts, or a faulty blower motor capacitor that is preventing the fan from running at the correct speed. Do not attempt to bypass this switch; it is a critical safety device designed to prevent a potential fire hazard.


Cross-Reference

  • Superseded Part:

    SWT01280, SWT1280 (older, shortened version)
  • Legacy / Manufacturing Numbers:

    C340056P18, X13540649180, 270159795307
  • Rating ID:

    L155-30F (engineering number indicating a 155°F limit switch with a 30°F differential).


Model Compatibility

This limit switch is compatible with various Trane and American Standard high-efficiency furnaces and packaged units. Below are common compatible model prefixes; always verify the exact fit with your unit's data plate.


Trane Models:

  • TDD: TDD080C945A2, TDD080R9V3A1, TDD120C960C4, TDD1B080A9451BA
  • TDE: TDE080A945B0, TDE120A960K1, TDE1B080A9451AC
  • TUD: TUD120C960J0, TUD1D120A9601AB
  • CDB/CDE: CDB080A945A0, CDB1B080A9451AB, CDE120A960C1
  • Other: FCAB080A40A0 (Downflow), FCAD120A50E0


American Standard Models:

  • ADD: ADD080C945A2, ADD080R9V3B0, ADD120C960B1, ADD1B080A9451AA
  • ADE: ADE1B060A9361AA
  • AUD: AUD120C960J1, AUD1D120A9601BA

Specification

Refund policy

Refund & Return Policy

Last Updated: June 2026

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Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

Michel & Siso are very knowledgeable and explain everything to where I could understand! Amazing experience! Thank you will always come here for any AC needs. Trustworthy and excellent customer service.

Celest G.
Verified Customer
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