Trane SWT3927 Limit Switch
The Trane SWT3927 Limit Switch is a critical safety component designed for precise thermal regulation in residential and commercial forced-air systems. This L155-60F limit switch features a cutout temperature of 155°F and a 60°F differential, ensuring the heat exchanger does not exceed safe operating parameters. When the plenum temperature hits the high-limit setpoint, this genuine OEM Trane part interrupts the burner circuit, preventing equipment damage and hazardous conditions. As a direct replacement for various Trane furnace high limit switches, the SWT3927 provides the exact calibration required for the control board to monitor airflow restrictions or blower motor failures. Techs should verify the furnace high limit switch location and ensure the mounting orientation matches the original factory specifications for accurate temperature sensing. Relying on this Trane OEM replacement part ensures full compatibility with the furnace's safety secondary circuit and maintains the system's UL certification integrity during service calls.
Key Benefits:
- Precise Thermal Calibration: Features a fixed 155°F trip point to prevent heat exchanger cracking and thermal stress.
- OEM Reliability: Direct Trane SWT3927 replacement ensures terminal alignment and bracket fitment match factory specs.
- Automatic Reset Logic: Incorporates a 60°F reset differential to restart the heating cycle once safe temperatures are restored.
- Wide Compatibility: Engineered for use in specific Trane and American Standard furnaces requiring an L155-60F rating.
- Enhanced System Safety: Provides essential protection against restricted return air or dirty filter conditions.
Common Questions:
What does the L155-60F rating signify?
The "L" stands for Limit. 155 is the temperature (in Fahrenheit) at which the switch opens the circuit, and 60 is the differential, meaning the switch will close again after the temperature drops by 60 degrees.
How do I troubleshoot a furnace limit switch tripping?
If the SWT3927 is opening frequently, check for restricted airflow, such as a clogged pleated filter, closed supply registers, or a failing blower motor capacitor.
Is the Trane SWT3927 a universal HVAC part?
No, this is a specific high temperature limit control. You must match the L-rating and part number to ensure the burner shuts off at the correct safety threshold designed for your specific furnace model.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $35.67
-65%$35.67
$12.48Trane SWT3927 Limit Switch
The Trane SWT3927 Limit Switch is a critical safety component designed for precise thermal regulation in residential and commercial forced-air systems. This L155-60F limit switch features a cutout temperature of 155°F and a 60°F differential, ensuring the heat exchanger does not exceed safe operating parameters. When the plenum temperature hits the high-limit setpoint, this genuine OEM Trane part interrupts the burner circuit, preventing equipment damage and hazardous conditions. As a direct replacement for various Trane furnace high limit switches, the SWT3927 provides the exact calibration required for the control board to monitor airflow restrictions or blower motor failures. Techs should verify the furnace high limit switch location and ensure the mounting orientation matches the original factory specifications for accurate temperature sensing. Relying on this Trane OEM replacement part ensures full compatibility with the furnace's safety secondary circuit and maintains the system's UL certification integrity during service calls.
Key Benefits:
- Precise Thermal Calibration: Features a fixed 155°F trip point to prevent heat exchanger cracking and thermal stress.
- OEM Reliability: Direct Trane SWT3927 replacement ensures terminal alignment and bracket fitment match factory specs.
- Automatic Reset Logic: Incorporates a 60°F reset differential to restart the heating cycle once safe temperatures are restored.
- Wide Compatibility: Engineered for use in specific Trane and American Standard furnaces requiring an L155-60F rating.
- Enhanced System Safety: Provides essential protection against restricted return air or dirty filter conditions.
Common Questions:
What does the L155-60F rating signify?
The "L" stands for Limit. 155 is the temperature (in Fahrenheit) at which the switch opens the circuit, and 60 is the differential, meaning the switch will close again after the temperature drops by 60 degrees.
How do I troubleshoot a furnace limit switch tripping?
If the SWT3927 is opening frequently, check for restricted airflow, such as a clogged pleated filter, closed supply registers, or a failing blower motor capacitor.
Is the Trane SWT3927 a universal HVAC part?
No, this is a specific high temperature limit control. You must match the L-rating and part number to ensure the burner shuts off at the correct safety threshold designed for your specific furnace model.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
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Description
The Trane SWT3927 Limit Switch is a critical safety component designed for precise thermal regulation in residential and commercial forced-air systems. This L155-60F limit switch features a cutout temperature of 155°F and a 60°F differential, ensuring the heat exchanger does not exceed safe operating parameters. When the plenum temperature hits the high-limit setpoint, this genuine OEM Trane part interrupts the burner circuit, preventing equipment damage and hazardous conditions. As a direct replacement for various Trane furnace high limit switches, the SWT3927 provides the exact calibration required for the control board to monitor airflow restrictions or blower motor failures. Techs should verify the furnace high limit switch location and ensure the mounting orientation matches the original factory specifications for accurate temperature sensing. Relying on this Trane OEM replacement part ensures full compatibility with the furnace's safety secondary circuit and maintains the system's UL certification integrity during service calls.
Key Benefits:
- Precise Thermal Calibration: Features a fixed 155°F trip point to prevent heat exchanger cracking and thermal stress.
- OEM Reliability: Direct Trane SWT3927 replacement ensures terminal alignment and bracket fitment match factory specs.
- Automatic Reset Logic: Incorporates a 60°F reset differential to restart the heating cycle once safe temperatures are restored.
- Wide Compatibility: Engineered for use in specific Trane and American Standard furnaces requiring an L155-60F rating.
- Enhanced System Safety: Provides essential protection against restricted return air or dirty filter conditions.
Common Questions:
What does the L155-60F rating signify?
The "L" stands for Limit. 155 is the temperature (in Fahrenheit) at which the switch opens the circuit, and 60 is the differential, meaning the switch will close again after the temperature drops by 60 degrees.
How do I troubleshoot a furnace limit switch tripping?
If the SWT3927 is opening frequently, check for restricted airflow, such as a clogged pleated filter, closed supply registers, or a failing blower motor capacitor.
Is the Trane SWT3927 a universal HVAC part?
No, this is a specific high temperature limit control. You must match the L-rating and part number to ensure the burner shuts off at the correct safety threshold designed for your specific furnace model.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
