CHECK
REMOVE FOREIGN MATE-
FOREIGN MATERIAL IN FAN
PROBLEM NOT IN BLOWER
VIBRATION STILL PRESENT
CHECK MOTOR MOUNTING
REPLACE MOTOR/WHEEL
FAN RUBBING HOUSING
NOISE STILL PRESENT
ADJUST TO CORRECT
COMPRESSOR
TOR
POSSIBLE RADIA-
BLOWER
REPLACE MOTOR
REPLACE MOTOR
MOUNTING OK
NOISE GONE
NOISE GONE
FAN
OR SCROLL
VIBRATION
RE-CHECK
RE-CHECK
RE-CHECK
RE-CHECK
RE-CHECK
RE-CHECK
TIGHTEN
SYSTEM
SCROLL
NOISE
LOOSE
NOISE STILL PRESENT
AREA
OR
RIAL
YES
YES
OK
NO
NOISE PRESENT
BLOWER MOTOR NOISE OR
A/C AND HTR.
A/C
BUT
NOT
HTR.
CHECK
PL
MOTOR IN ALL SPEED
DIAGNOSIS AND TESTING (Continued)
VIBRATION
NOISE
LEAVE ENGINE ON
ENGINE ON
SHUT BLOWER MOTOR OFF
BLOWER
MODES
Fig. 12 Blower Motor Noise/Vibration Diagnosis
HEATING AND AIR CONDITIONING
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