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Trane SWT1259 Auto Limit Switch 3" Insert 160°F-190°F

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Special Price $52.37 Regular Price $60.23
In stock
SKU
SWT1259
The Trane SWT1259 Auto Limit Switch is a safety part that is intended to limit the temperature settings of an HVAC system. Serving as a temperature control, the system turns off the equipment in case the temperature goes beyond the optimal 160°F-190°F, preserving heat-exchanging equipment and other critical components. This screw, with an insertion length of 3 inches is widely used in furnaces, air conditioners as well as heat pumps. The advantages of this automatic shutdown feature include avoiding expensive repairs, safe operation, and extending the durability of HVAC equipment since the risk of fire or failure of a component due to excessive heat is eliminated.
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HVAC Controls, Air Conditioner Switch
Manufacturer:
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Specifications

  • Type: Auto Limit Switch
  • Temperature Range: 160-190°F
  • Insertion Length: 3"
Manufacturer Name: Trane
Product Number: SWT1259
OEM Part Number: SWT1259
Product Description: 160-190F Autolimitswitch3"Ins
Weight:0.21lbs/95.25g

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Product Questions (2)
Customer Questions
What maintenance is required for the Trane SWT1259 Auto Limit Switch?

Regularly inspect the limit switch for loose wiring, corrosion, or heat damage. Keep the surrounding area clean to prevent dust buildup that may affect temperature sensing accuracy. Verify proper mounting and temperature response during system inspections. Always disconnect power before servicing to avoid electrical hazards.

What are common issues with the Trane SWT1259 Auto Limit Switch?

  • Contact wear leading to intermittent switching.
  • Sensor miscalibration causing inaccurate temperature cutoff.
  • Electrical connection looseness.
  • Overheating or failure to trip at set limits.
  • Corrosion affecting conductivity.
  • Thermal drift under prolonged use.

Installation Steps

Step 1: Turn off power to HVAC system and verify voltage for safety.

Step 2: Remove access panel and locate existing limit switch assembly.

Step 3: Disconnect wiring carefully, noting terminal positions for reinstallation.

Step 4: Insert new switch into port and secure firmly.

Step 5: Reconnect wires as labeled and ensure tight connections.

Step 6: Restore power and test system operation for proper cutoff temperature.