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SWT01277 Trane OEM Replacement Limit Switch Open at 145°F, Close at 115°F

SWT01277 Trane OEM Replacement Limit Switch Open at 145°F, Close at 115°F

Low stock: 5 left

Regular price $74.99 USD
Regular price Sale price $74.99 USD
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Quick Feature Highlights

  • Genuine OEM Replacement for Trane & American Standard systems.

  • 145°F Safety Trip point for overheat protection.

  • 3-Inch Insert length for accurate thermal sensing.

  • Auto-Reset at 115°F for seamless operation.

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

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Specifications

Product Details & Specification

  • Brand: Trane / American Standard
  • Part Number: SWT01277
  • Description: Thermal Limit Switch
  • Open Temperature: 145°F
  • Close Temperature: 115°F (30°F Differential)
  • Insert Length: 3.0 Inches
  • 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 SWT01277 Genuine OEM Furnace Limit Switch (145°F / 3" Insert)


The Trane / American Standard SWT01277 is an official Genuine OEM thermal limit switch designed for vital safety functions within HVAC equipment. This safety device constantly monitors internal system temperatures. The switch functions by opening the electrical circuit at 145°F and closing it at 115°F, acting as a rapid safety shut-off for the equipment if the temperature exceeds the set limit. It is a robust 3-inch insertion limit switch commonly found in various Trane and American Standard furnaces and packaged units.


Key Features

  • Precision Thermal Operation: Calibrated to safely "Open" the electrical circuit at 145°F, immediately cutting power to the gas valve during an overheat event.
  • Automatic System Reset: The switch automatically "Closes" at 115°F, allowing the system to resume normal operation once safe temperatures are restored.
  • Optimal Sensing Depth: Features a 3-inch insertion size (probe length), ensuring the sensor reaches the critical airflow stream for accurate temperature monitoring.
  • OEM Reliability & Safety: Manufactured to rigorous Trane/American Standard specifications, handling electrical loads up to 5.8 FLA at 120V AC with quick connect terminals.


Product Details & Specification

  • Brand: Trane / American Standard
  • Part Number: SWT01277
  • Description: Thermal Limit Switch
  • Open Temperature: 145°F
  • Close Temperature: 115°F (30°F Differential)
  • Insert Length: 3.0 Inches
  • 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 lower temperature trip point like 145°F is typical for smaller-BTU or packaged rooftop units (RTUs) which have different internal airflow dynamics than standard upflow furnaces. If this limit switch consistently trips, do not bypass it. Instead, check the evaporator coil for being frozen solid, a severely blocked intake vent, or a weak blower capacitor, as these restrict necessary airflow.


Cross-Reference

  • Superseded Part:

    SWT01277, SWT1277
  • Legacy / Manufacturing Numbers:

    C340056P15, X13540649150, 270159795007, X13541189-01
  • Rating ID:

    L145-30F (Indicates 145°F trip and 30°F differential).

Note: L180-30F may appear on drawing lists but the active part is L145-30F.


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 & American Standard Packaged/Furnace Models (GBC Series):

  • GBC036 Series: GBC036A3ELA, GBC036A3ELB01, GBC036A3ELB020, GBC036A3ELB03A, GBC036A4ELA, GBC036A4ELB04A1, GBC036A4ELB08C
  • GBC048 Series: GBC048A3ELA, GBC048A3ELB02, GBC048A3ELB04, GBC048A4ELA0, GBC048A4ELB030, GBC048A4ELB07B000A1
  • GBC060 Series: GBC060A3ELA, GBC060A3ELB01C0, GBC060A3ELB02C004, GBC060A4ELA, GBC060A4ELB03A, GBC060A4ELB09C100A1

Specification

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Last Updated: June 2026

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Plano, TX 75074
United States

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Contact Us

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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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