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Motorcraft YH-1666 Climate Control Vacuum Valve Plenum Defrost Door OE Replacement

(Ford Crown Victoria 1992-2012, E-350 Super Duty 2004, Fiesta 1979-80, E-150 1988-2004, E-250 1988-2004, E-350 Econoline 1988-2002 + 22 more models)

Manufacturer

Picture for manufacturer Motorcraft

Part Number

YH-1666
4 reviews
Sale Price

$101.31

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Product Details

The Motorcraft YH-1666 is a direct-fit OE replacement climate control vacuum valve designed for the plenum chamber and defrost door position in Ford, Lincoln, and Mercury HVAC systems. As a genuine Motorcraft part, it is engineered to match the original factory component in fit, form, and function — restoring proper airflow door operation and climate control performance.

Vacuum-operated HVAC valves like the YH-1666 control the movement of air distribution doors within the plenum chamber, including the defrost door. When these valves fail, symptoms typically include loss of defrost function, improper airflow direction, or doors stuck in a single position. Replacing the valve with an OE-spec Motorcraft unit ensures correct vacuum response and reliable door actuation.

Key Features:

  • Direct-fit OE replacement — no modifications required
  • Replaces OE part number 6W7Z18A318BA
  • Controls plenum chamber defrost door operation via vacuum actuation
  • Manufactured to Ford Motor Company specifications
  • Backed by Motorcraft's 12-month or 12,000-mile limited warranty
  • Sold individually

Motorcraft is the factory-recommended parts brand for Ford, Lincoln, and Mercury vehicles. Cross-reference OE number: 6W7Z18A318BA.

Products specifications

Fits

Ford Crown Victoria 1992-2012, E-350 Super Duty 2004, Fiesta 1979-80, E-150 1988-2004, E-250 1988-2004, E-350 Econoline 1988-2002, E-450 Super Duty 2003-04, E-150 Econoline 1988-2002, LTD 1979-86, E-250 Econoline 1988-2002 + 18 more models

I ordered a set of inner tie rods for my car from Autoplicity and found their prices to be the lowest online for the brand I was looking for. Items were ship out in 2 business days from the original manufacturer. Shipping prices were kind of on the expensive end considering the package size and weight so if Autoplicity adjust their shipping prices to be more competitive, I think their service and pricing would be hard to beat!

Wow talk about FAST shipping...I placed the order...and the door bell rang for delivery!!! The electronic points and coil when in the FJ 4o in just a few minutes and work perfectly...THANKS so much! Larry in Montana

Great pricing and quick shipping. I'll be using them again for sure.

Great!!

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