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Utica-Dunkirk 30071 Limit Switch L155-20F

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Special Price $15.84 Regular Price $20.59
In stock
SKU
30071
The Utica-Dunkirk 30071 Limit Switch L155-20F is a temperature-sensitive safety control used to monitor heat levels within compatible heating equipment. Commonly installed in furnaces, boilers, and gas-fired units, this limit switch responds to temperature changes by interrupting the electrical circuit when operating conditions exceed the specified range of HVAC systems. It operates as part of the appliance's safety and control system protect internal components from overheating during heating cycles. This switch is typically used in repair and replacement applications.
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HVAC Controls & Electrical, Safety & Limit Devices
Manufacturer:
https://www.partshnc.com/media/catalog/product/3/0/30071_utica-dunkirk_partshnc.png
Manufacturer Name: Utica-Dunkirk
Product Number: 30071
OEM Part Number: 30071
Product Description: L155-20F Limit Switch
Weight:0.26lbs/117.93g

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Product Questions (2)
Customer Questions
What maintenance is required for the Utica-Dunkirk 30071 L155-20F Limit Switch?

Regularly inspect the limit switch for dust, corrosion, and loose wiring connections. Ensure the actuator moves freely and responds correctly during operation. Proper maintenance helps maintain accurate safety control and prevents unexpected equipment shutdowns.

What are common issues with the Utica-Dunkirk 30071 L155-20F Limit Switch?

  • Mechanical wear or sticking actuator causing inconsistent switching response.
  • Electrical contact degradation leading to intermittent signal loss or failure.
  • Misalignment with target mechanism causing false triggering or no activation.
  • Wiring looseness or internal fatigue resulting in inaccurate operation.

Installation Steps

Step 1: Disconnect power to the boiler or furnace before servicing.

Step 2: Locate the existing limit switch and note the wire connections.

Step 3: Disconnect the wires and remove the mounting screws holding the old switch.

Step 4: Install the new limit switch in the same position.

Step 5: Reconnect the wires to the correct terminals and secure all connections.

Step 6: Restore power and verify proper system operation.