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Automatic A/c-Heater Systems: Overview Audi A4 B5 facelift

Automatic HVAC System 2 illustrations ~124 words

DESCRIPTION

WARNINGTo avoid injury from accidental air bag deployment, read and carefully follow all SERVICE PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM procedures in AIR BAG SYSTEM SAFETY article in GENERAL SERVICING.

The A/C-heater control panel has buttons to control system. Blower speed is controlled automatically according to difference between selected temperature and interior temperature. Blower speed can also be controlled manually.

The A/C-heater control panel left side display shows selected temperature and automatic functions. (Scheme 5) The right side display indicates manual functions. The A/C-heater system microprocessor, located within A/C-heater control panel, has a self-diagnostic feature.

The A/C-heater system automatically maintains temperatures from 64°F (18°C) to 84°F (29°C). If a temperature greater than 84°F (29°C) is selected, the word HI appears in temperature display. If temperature less than 64°F (18°C) is selected, the word LO is displayed. Selection of these temperatures overrides automatic climate control system.

Scheme 4

Scheme 4

Scheme 5

Scheme 5