Cart 0
Limit switch Nordyne L170-40F 626613
626613 Nordyne Limit Switch (L170-40F)

626613 Nordyne Limit Switch (L170-40F)

  • Save $ 4.88
Shipping calculated at checkout.

626613 Nordyne Limit Switch (L170-40F)

Product Overview

626613 is a factory-original Nordyne auto-reset temperature-limit switch, model L170-40F. It opens at approximately 170 °F and resets automatically at 40 °F, providing reliable over-temperature protection. This two-pole switch mounts via threaded stud for secure installation in the heat exchanger or plenum.


Technical Specifications

  • Contact arrangement: 2-pole, normally closed at ambient

  • Opening temperature: 170 °F ± 5 °F

  • Reset (closing) temperature: 40 °F ± 5 °F

  • Differential (open-to-reset span): 130 °F

  • Mounting: 1/4″-20 threaded stud

  • Contact rating: 15 A @ 120/240 VAC resistive

  • Housing: zinc-plated steel

  • Terminals: 1/4″ male spade quick-connect

  • Weight: 0.249 lb

  • Shipping dimensions: 10 × 12 × 12 in; package weight 10 oz


Cross-Reference Part Numbers

OEM Part Number Notes
626613 L170-40F limit switch
626562 Superseded part
626562R Superseded revision


Compatibility

This limit switch fits Nordyne, Nortek, Armstrong, and private-label gas furnaces requiring a 170 °F auto-reset limit. Common applications include:

  • Heat exchanger high-limit protection

  • Plenum over-temperature cut-out

  • Fan interlock in multi-stage systems

Always verify temperature ratings and mounting style against the furnace’s data plate before ordering.


Technician Notes

  1. De-energize power and shut off the gas supply before servicing.

  2. Remove furnace access panels and locate the existing limit switch.

  3. Label and disconnect each spade terminal.

  4. Unscrew the old switch from its mounting boss and inspect for corrosion or damage.

  5. Hand-thread the new 626613 switch into place; torque to OEM specification.

  6. Reconnect wires to the correct spade terminals, ensuring a snug fit.

  7. Restore power and call for heat; verify the switch remains closed at ambient and opens at 170 °F.

  8. If the switch fails to open or reset properly, test continuity and temperature response per the service manual.


Additional Resources

  • Printable limit switch cross-reference sheet

  • Wiring schematic and installation guide (PDF)

  • Video tutorial: Replacing auto-reset limit switches

L170-40F limit switch. Size 36TX11. Replaces 626562 & 626562R.