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Compressor ON, if AC switch is ON Compressor OFF, if AC switch is OFF Circulating OPEN circulated air air flap CLOSED fresh air Mixing flap center nozzle if center nozzle is closed, mixing flap remains open minimum speed manual speed regulation from 1 to 4 The numbers 0-100 indicate the control unit operating motor movement in . Operating motor position 0 cooling operating motor linkage moved down 100 heating operating motor linkage moved up The operating motor runs from down 0 to up 100 or...
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CEL 928.610.105.08 is not for installation in older models. Timing relay underneath center console, rear wiper relay next to battery ground point. Replace relay V with relay 928.616.131.00 when installing a trailer hitch. Central electric CEL is new. 928.610.105.09 The fuse plate holds 45 fuses was 35 . This was made possible by using flat fuses. The fuses are compiled into blocks of 5 fuses each and are no longer marked with numbers. The fuses must be counted off from left to right, in order...
Inside Sensor
The inside temperature sensor is located in the sensor housing to the right of the center nozzle in the draft of a small blower . The electric connection is made via a 4-pin flat male plug 5 on the right side of the center console. Remove trim panel on right side of center console. Disconnect 4-pin flat male plug 5 . Connect a calibrated ohmmeter range x 100 between terminals 1 and 2 both yellow . Ohmmeter should display the following values at 20 C approx. 2570 ohms Blow through sensor housing...
Information
Copyright by Dr.-lng. h.c. F. Porsche I E 1 The new edition of the test plan for the automatic heating and air conditioning system in Type 928 cars contains the following information. Fresh and Heated Air Controls - 1978 1979 Models 2 Wiring Diagram - 1978 1979 1980 Models 3-5 Automatic Air Conditioner Operation Up To 1983 Model 6 Test Plan for Automatic Air Conditioner 1980 to 1983 7 29 Air Distribution in General 30 31 Wiring Diagram in General Up To 1983 Model 32 Air Conditioner 1984 Model...
Flap Control
Here is a survey of sliding control lever and flap positions. Requirements engine running and vacuum built up. Heating is only effective when the upper sliding control lever is pushed to the right and the lower control lever is positioned at an air distribution symbol. Upper lever controls heater valve W and coritr. flaps B Upper lever controls heater valve W and coritr. flaps B Both levers must be on right end for defrost Lower lever controls air distribution, turning on AC and opens heater...