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Lennox 36K14 Auxiliary Limit Switch 150°F Open/140°F Close

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Special Price $17.33 Regular Price $22.53
In stock
SKU
36K14
The Lennox 36K14 Auxiliary Limit Switch 150OPN 140Cls is a security component which was specially developed to enhance the functionality of HVAC systems. This switch is a safety device that controls and measures the temperature of heating apparatus such as furnaces and heat pumps. If the temperature goes beyond the optimal working conditions, the switch stops the circuit and thus the risks of damage. The Auxiliary Limit Switch work at precise temperature; the switch triggers at 150°F and resets at 140°F in order to meet the need for efficient temperature regulation as well as safety measure.
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Limit Switches, HVAC Controls & Electrical
Manufacturer:
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Specifications

  • Weight:0.04lbs
  • Measure:Unit
  • Length: 2 Inch
  • Width: 1.5 Inch
  • Height: 1.25 Inch
Manufacturer Name: Lennox
Product Number: 36K14
OEM Part Number: 36K14
Product Description: Aux Limit Switch 150Opn 140Cls
Weight:0.04lbs/18.14g

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Product Questions (2)
Customer Questions
What maintenance is required for the Lennox 36K14 Auxiliary Limit Switch?

Inspect the switch periodically for secure mounting and proper alignment to ensure accurate temperature response. Check electrical terminals for tight, corrosion-free connections to maintain accurate signal switching. Keep the surrounding area clean and free of dust or debris that could affect switch performance.

What are common issues with the Lennox 36K14 Auxiliary Limit Switch?

  • Failure to open or close at correct temperature thresholds.
  • Intermittent switching or electrical contact failure.
  • Corrosion on terminals causing poor conductivity.
  • Mechanical sticking due to debris or wear.
  • HVAC system cycling improperly due to faulty switching signal.

Installation Steps

Step 1: Disconnect power to HVAC system for safety.

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

Step 3: Label and disconnect wires from old switch carefully, noting terminals.

Step 4: Mount in same orientation and secure firmly.

Step 5: Reconnect wiring per diagram, ensuring tight connections and proper polarity.

Step 6: Restore power and test operation, verify cutoff at 140/150°F settings.

Step 7: Observe system cycle and confirm automatic shutdown and restart operation.