Lennox Contactor 10F74

Lennox 10F74 1-Pole Definite Purpose Contactor | 40 Amp, 24 VAC Coil

Restore reliable, high-voltage electrical switching to your condensing unit or heat pump with the genuine Lennox 10F74 Definite Purpose Contactor. This high-performance Factory Authorized Part is a critical control relay engineered specifically for residential and commercial air conditioning and outdoor heat pump systems across the Lennox family of brands, including Armstrong Air, Ducane, and Allied Air. Featuring a 24 VAC control coil, this single-pole contactor uses a low-voltage thermostat signal to safely close the heavy-duty contacts, sending line voltage power directly to your outdoor compressor and condenser fan motor.

Manufactured by Hartland Controls (Model HCC-1XQ04AG106), this contactor features a 1-Pole + Shunt configuration (breaks one leg of power while the other remains connected via a continuous brass bus bar), ensuring a direct physical and electrical drop-in replacement.

Technical Specifications:

  • Model/Part Number: 10F74
  • Manufacturer Model: Hartland Controls HCC-1XQ04AG106
  • Configuration: 1-Pole with Continuous Shunt
  • Full Load Amps (FLA): 40 Amps
  • Coil Voltage: 24 VAC (50/60 Hz frequency range)
  • Application: Residential and Commercial Outdoor Condensing Units

Key Features & Benefits:

  • Genuine OEM Electrical Integrity: This is an authentic factory-certified replacement control—not a low-grade aftermarket copy. Engineered with heavy-duty contacts that resist arc pitting and sticking under high current draws.
  • Quiet, Humming-Free Performance: Built to strict industrial manufacturing tolerances with precision magnetic core laminations, eliminating the loud, continuous chattering or buzzing noises typical of low-grade relays.
  • Standard Industrial Footprint: Features standard panel mount backing hole configurations and robust terminal connections, allowing technicians to swap out a failing legacy contact block in minutes without custom field re-wiring.

Compatibility & Cross-Reference

The 10F74 definite purpose contactor serves as the official modern factory upgrade for an extensive lineup of obsolete or discontinued controls. It is a verified direct fit and replacement for:

  • Legacy Part Numbers: Lennox P/N 100438-05, 100438-02, 95M5601, and 95M56.
  • Equipment Lineup: Used extensively in Lennox, Armstrong, and Ducane outdoor central air conditioner split systems and heat pump units.

Why Buy From Shortys HVAC Supplies?

At Shortys HVAC, we focus exclusively on providing Original Equipment Manufacturer (OEM) components because reliable electrical switching is paramount to preventing total system downtime. Installing an authentic Lennox factory part ensures your high-voltage circuit operates safely to its original factory engineering standards, safety listings, and active warranty lines.

Shipping Information: We provide fast, competitive shipping rates across the continental United States, delivering critical electrical relays directly to your shop or doorstep to quickly eliminate system down-time.

$57.00

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  • Model: 10F74
  • Manufactured by: Lennox
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