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Trane SWT3927 Limit Switch L155°F-60°F

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Special Price $42.32 Regular Price $55.02
In stock
SKU
SWT3927
The Trane SWT3927 Limit Switch L155°F-60°F is one of the safety devices that need to be installed in HVAC systems to keep temperature in check. It works like a single pole single throw (SPST) switch having one set of contacts which opens or closes as per the surrounding temperature. To illustrate this let us assume that the Trane Limit Switch L155°F-60°F is fitted in a heating system. At higher temperatures, the switch will remain turned off. Still, when the thermostat reaches 155°F the switch will turn off the heating system to prevent over heating.
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Limit Switches, HVAC Controls & Electrical
Manufacturer:
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Specifications

  • Range of Temperature: L155°F-60°F
  • Switch Type: Limit Switch
  • Length: 1.2"
  • Control Output: SPST
Manufacturer Name: Trane
Product Number: SWT3927
OEM Part Number: SWT3927
Product Description: L155-60F Limit Switch
Weight:0.14lbs/63.5g

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Product Questions (2)
Customer Questions
What maintenance is required for the Trane SWT3927 Limit Switch?

Regularly inspect the limit switch for dust, debris, or corrosion on terminals and contacts. Ensure secure wiring connections and proper mounting position. Clean gently with a dry cloth if needed. Proper maintenance helps ensure accurate temperature control and prevents overheating or system malfunctions.

What are common issues with the Trane SWT3927 Limit Switch?

  • Failure to open or close at set temperature.
  • Electrical contact wear or pitting.
  • Loose or corroded wiring connections.
  • Inaccurate temperature response or calibration drift.

Installation Steps

Step 1: Turn off power to HVAC unit and confirm zero voltage.

Step 2: Remove access panel and locate existing limit switch on heat exchanger.

Step 3: Disconnect wiring noting terminal positions.

Step 4: Remove old switch and mount new switch in same orientation.

Step 5: Reconnect wires securely.

Step 6: Restore panel and power then test temperature cut-off operation.