Cadillac 60 Series 1963 Shop Manual page 448

13-67
AIR CONDITIONER DIAGNOSIS CHART (Cont'd.)
Condition
Noise or vibration.
Objectionable odors being dis-
charged through Air Condi-
tioner outlets.
Possible Cause
Loose compressor belt.
Loose compressor mountings.
Damaged compressor shell or
worn internal parts.
Defective expansion valve.
System operates on "Recirc"
air at all times, even though
set for "Cool" air operation.
Odor producing substances de-
posited on evaporator core.
Remedy
Adjust belt tension.
Tighten compressor mountings.
Repair or replace compressor.
Replace expansion valve.
Check and repair vacuum sys-
tem to obtain proper "Cool"
and "Recirc" operation.
Wash evaporator core.