Four Seasons HVAC Blower Control Switch 35718
Four Seasons HVAC Blower Control Switch 35718 - view 2
Four Seasons HVAC Blower Control Switch 35718 - view 3
Four Seasons HVAC Blower Control Switch 35718
Four Seasons HVAC Blower Control Switch 35718 - view 2
Four Seasons HVAC Blower Control Switch 35718 - view 3

Four Seasons HVAC Blower Control Switch P/N:35718

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$21.99
MPN: 35718
Item Package Quantity: 1
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Four Seasons HVAC Blower Control Switch P/N:35718
Four Seasons HVAC Blower Control Switch P/N:35718
$21.99

Take command of the cab's airflow with the Four Seasons HVAC Blower Control Switch 35718, a lever selector blower switch that directs current to the heater/AC blower circuit so you can select fan operation. It installs as a direct-fit replacement across a broad range of Kenworth trucks — including the C500 (1981-2006), K100E (1985-2003 and 2005-2006), K300 (1993-2005), T300 (1995-2006), T600A (1986-2006), T800 (1987-2006), and W900 (1981-2006) — with all listed applications using one switch (see the Buyer's Guide tab for the full list).

  • Rated up to 20 amps: sized to carry the blower circuit's current draw.
  • Quality contacts: designed to maintain proper conductivity through the selector.
  • Zinc coated: the coating helps resist corrosion.
  • Connector: rectangular, male, 5-terminal connection for a vehicle-specific fit.

Built to meet or exceed OEM specifications and backed by decades of Four Seasons mobile A/C experience. If a worn or failed blower selector switch is behind lost fan control, this replaces it. Manufacturer part number 35718.

Frequently Asked Questions

What does this switch do?

It's a lever selector blower switch that routes current through the HVAC blower circuit, letting you select blower operation for the heater and A/C system.

What vehicles does the 35718 fit?

It's a direct-fit replacement for many Kenworth trucks, including the C500, C540, C550, K100E, K300, T300, T600A, T800, and W900. Check the Buyer's Guide tab for the complete year list.

What is the amp rating?

The switch is rated to carry up to 20 amps, sizing it for the blower motor circuit's current draw.

What connector does it have?

It uses a rectangular, male connector with 5 terminals for a vehicle-specific fit.

What are signs this switch may need replacing?

If the blower stops responding or you can no longer change fan settings, a worn or failed selector switch may be the cause. Diagnose the circuit before replacing, since other components can produce similar symptoms.

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