Audi A3 1997 Manual page 108

Audi A3 1997 ➤
Heating, Air Conditioner - Edition 06.2000
- -> The control unit switches off the heated rear window after a heating period of approx. 15 minutes and
the switch-on telltale in switch -A- goes out.
- If the voltage on the control unit for the heated rear window falls below 9V, the heated rear window
remains switched off until it is above 10 V again.
- When the heated rear window is switched on, the telltale in switch -A- is lit.
- When the air recirculation mode is selected, the telltale in switch -B- is lit.
- The control unit for the heated rear window and fresh-air/recirculated air switchover and the lamps (LEDs
= light emitting diodes) for illuminating the switches and rotary switches may not be replaced individually.
- If the ignition is switched off and then back on again, the heated rear window remains switched off and
the heating changes to or remains in fresh air mode.
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Notes for vehicles with map-controlled cooling
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
◆ -> A heater control with an additional electrical component -A- is installed in vehicles with map-controlled
cooling. Switch -F269 for temperature selection rotary knob and potentiometer -G267 for temperature se‐
lection rotary knob are installed in this component (potentiometer = variable resistance).
=> Parts List
◆ -> Two-way valve -N147 is actuated via switch -F269 (contacts 1 and 2) if rotary temperature switch -A- is
at "cold" stop. This then switches vacuum through to refrigerant shut-off valve and the refrigerant shut-off
valve shuts off the flow of refrigerant through the heat exchanger in heater.
102
80 - Heating
with respect to the correctness of information in this document. Copyright by AUDI AG.