LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Volkswagen >> 1996 >> Passat GLS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - Gasoline >> Air Induction Systems >> Intake Air Preheating >> Control Flap & Temperature Regulator (2.0L)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Control Flap & Temperature Regulator (2.0L)

  1. Ensure no air leaks exist in control flap vacuum reservoir. Loosen air cleaner upper section and remove air filter.
  2. Turn air cleaner upper part to access control flap in air cleaner lower section. Disconnect vacuum hose from temperature regulator. Connect hand-held vacuum pump to vacuum hose. Apply vacuum. Control flap will close cold air intake.
  3. Reconnect vacuum hose to temperature regulator. Start engine and allow it to idle. Check position of control flap after 20 seconds. Replace temperature regulator if position of control flap is not as specified. See TEMPERATURE REGULATOR table.
TEMPERATURE REGULATOR

Temperature °F (°C) Control Flap Position
Less Than 68 (20) Cold Air Intake Closed
Between 68-86 (20-30) Open To Both Hot & Cold Air Intake
More Than 86 (30) Hot Air Intake Closed