Chrysler Conquest 1988 Service Manual page 935

AIR CONDITIONING - Troubleshooting
24-59
Symptom
6. Air inlet switching
damper does not
operate
Probable cause
Open harness between full auto air conditioner
panel assembly and control unit
Remedy
Correct harness
Open harness between air inlet switching
vacuum solenoid valve and control unit
Correct harness
7. Air outlet switch-
ing damper does
not operate
Faulty control unit
Defective vacuum solenoid valve
Defective or disconnected vacuum hose
Defective vacuum system including vacuum
tank
Check diagnosis output
Replace vacuum solenoid valve
Check or replace vacuum hose
Check or replace vacuum system
Faulty full auto air conditioner switch
(mode selection)
Replace full auto air conditioner panel
assembly
Faulty air outlet switching control vacuum
actuator
Inadequate engagement between cam and
damper link or incorrect adjustment
Replace air outlet switching control
vacuum actuator
Correct engagement or adjust
FACE/DEF or FACE/FOOT damper failure Correct FACE/DEF or FACE/FOOT
damper
Open harness between full auto air conditioner
panel assembly and control unit
Correct harness
Open harness between air outlet switching
vacuum solenoid valve and control unit
3. Pusher fan does
not operate when
air conditioner is
operating
Faulty power relay (for pusher fan)
Faulty therm0 sensor No. 2
(vehicles with an intercooler)
Fault,y pusher fan motor
Faulty pressure switch
(vehicles with an intercooler)
Replace power relay
Check or replace therm0 sensor
Check or replace fan motor
Check or replace pressure switch
3. Temperature setting Faulty control unit Check diagnosis output
changes when
ignition switch is Insufficient battery charge or faulty battery
Recharge, adjust specific gravity or
turned to "OFF"
replace battery
position and back
to "ON" position Open harness between ignition switch and
Correct harness
control unit