Compressor Cut-Off Switch

The compressor cut-off switch is located at accelerator pedal assembly (Chevette) and on carburetor (Vega). Switch is used to prevent compressor operation during wide open throttle. This switch is installed on vehicles with automatic transmission only.

VEGA OPERATIONS CHART

Selector Lever Position

Blower Speeds Available

Air Source

Diverter Door

Air-Def Door

Compressor

Air Enters Vehicle

Off

All

Outside

Closed

Off

Floor Outlets

Max

Hi Only

Inside ⁽¹⁾

Open

Closed

On ⁽²⁾

Dash Outlets

Norm

All

Outside

Open

Closed

On ⁽²⁾

Dash Outlets

Vent

All

Outside

Open

Closed

Off

Dash Outlets

Htr

All

Outside

Closed

Off

Floor Outlets ⁽³⁾

Def

All

Outside

Closed

Open

Off

Defroster Outlets ⁽⁴⁾

⁽¹⁾	100% inside air is not available. Some outside air bleed-through is allowed.

⁽²⁾	Ambient temperature must be above 45°F, or more than 42 psi at discharge pressure switch.

⁽³⁾	Some bleed to defroster outlets.

⁽⁴⁾	Some bleed to floor outlets.

CHEVETTE OPERATIONS CHART

SELECTOR LEVER POSITION

BLOWER SPEEDS AVAILABLE

AIR SOURCE

HEATER DEFROSTER DOOR

A/C DOOR

AIR ENTERS VEHICLE

COMPRESSOR

OFF

ALL

OUTSIDE

OPEN

CLOSED

HEATER AND DEFROSTER OUTLETS

OFF

MAX

HI ONLY

INSIDE ⁽¹⁾

CLOSED

OPEN

DASH OUTLETS

ON ⁽²⁾

NORM

ALL

OUTSIDE

CLOSED

OPEN

DASH OUTLETS

ON ⁽²⁾

VENT

ALL

OUTSIDE

CLOSED

OPEN

DASH OUTLETS

OFF

HEATER

ALL

OUTSIDE

OPEN

CLOSED

HEATER OUTLETS ⁽³⁾

OFF

DEF

ALL

OUTSIDE

OPEN (TO DEFROST ONLY)

CLOSED

DEFROSTER OUTLETS ⁽⁴⁾

OFF

⁽¹⁾	100% inside air is not available. Some outside air bleed through is allowed.

⁽²⁾	The discharge pressure switch pressure must be above approximately 42 psi.

⁽³⁾	Some bleed to defroster outlets.

⁽⁴⁾	Some bleed to floor outlets.