Vacuum Unit for Footwell Heater Vent. Porsche 928 1980-95  ❭  92857407906

Footwell Heater Vent Vacuum Unit – HVAC Control Actuator 

High-quality replacement footwell heater vent vacuum unit designed for Porsche 928 models.

This component is part of the vehicle’s HVAC (heating, ventilation, and air conditioning) system, responsible for controlling the opening and closing of the footwell air vents. It operates via vacuum pressure to regulate airflow distribution within the cabin, ensuring proper heating performance and passenger comfort.

Fits:
Porsche 928 4.5L 1980-82
Porsche 928S 4.7L 1981-83
Porsche 928S2 4.7L 1984-86
Porsche 928S4 5.0L 1987-92
Porsche 928GT 5.0L 1989-91
Porsche 928GTS 5.4L 1992-95

Diagram ref no 5

Manufactured to OEM specifications, this vacuum unit ensures precise fitment and reliable operation—ideal for restoring correct airflow control and resolving HVAC system faults.

Key Features

• Direct replacement HVAC vacuum actuator
• Suitable for Porsche 928 models
• Controls footwell heater vent operation
• Restores proper airflow distribution
• OEM-style fit and function
• Durable construction for long-term reliability

Function and Purpose

The vacuum unit controls airflow direction within the cabin.

It helps to:

• Open and close footwell heater vents
• Regulate cabin air distribution
• Maintain effective heating performance
• Support overall HVAC system operation

Why Replace Your Vacuum Unit

Over time, vacuum actuators can fail due to age or diaphragm wear.

Common issues include:

• No airflow to footwell vents
• Stuck or non-responsive vents
• Weak or inconsistent cabin heating
• Vacuum leaks affecting HVAC performance

Replacing the unit restores proper heater function and airflow control.

Related reference numbers
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92857407906

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