Chrysler DODGE D150 1993 Service Manual page 1443

24 - 6 HEATING AND AIR CONDITIONING
BLOWER MOTOR NOISE / WIBRATION
BLOWER MOTOR NOISE
OR VIBRATION
NOISE
VIBRATION
ENGINE O N
CHECK BLOWER
MOTOR IN ALL
SPEED MODES
CHECK MOTOR
M O U N T I N G
NOISE PRESEh
n
A / C BUT
NOT HTR.
A / C
A N D HTR.
POSSIBLE
RADIATOR
FAN OR
COMPRESSOR
NOISE
LEAVE ENGINE O N
SHUT BLOWER
MOTOR OFF
NOISE STILL PRESENT
LO( DSE
TIGHTEN
RE-CHECK
MOUNTING
OK
OK
NOISE G O N E
PROBLEM NOT
IN BLOWER
SYSTEM
VIBRATION
STILL PRESENT
CHECK BLOWER
SCROLL AREA
FOREIGN MATERIAL IN
FAN OR SCROLL
YES
REMOVE
FOREIGN
MATERIAL
FAN
RUBBING
HOUSING
N O
REPLACE
MOTOR
RE-CHECK
VIBRATION
G O N E
YES
A
TO C
DJUST
ZORRECT
RE-CHECK
REMOVE BLOWER
WHEEL A N D
OPERATE BLOWER
MOTOR AT
LOW SPEED
REPLACE BLOWER
WHEEL
RE-CHECK
NOISE STILL
PRESENT
NOISE
G O N E
VIBRATION
STILL
PRESENT
REPLACE
MOTOR
RE-CHECK
REPLACE
MOTOR
RE-CHECK
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