TB 9-2320-360-13&P-1
A/C DOES NOT OPERATE
2.
WARNING
KNOWN INFO
Read WARNING on
Power to A/C system OK.
page 0042 00-5.
A/C circuit wiring OK.
A/C controls OK (except for A/C
Does A/C compressor clutch
binary switch and A/C
engage when A/C control
thermostatic switch).
switch is turned on, (low,
A/C receiver/dryer moisture
medium, or high blower
indicator indicates no moisture in
TEST OPTIONS
system.
speed) with engine switch in
ON position?
Visual Inspection.
POSSIBLE PROBLEMS
REASON FOR QUESTION
A/C receiver/dryer sight glass
indicates desiccant breakdown or
If A/C compressor clutch does not
oil in system.
engage, A/C will not operate.
A/C system charge low.
A/C compressor faulty.
Go to Step 21 of
Restricted A/C hose.
NO
this fault.
A/C thermostatic switch faulty.
Air or other contaminant in A/C
system.
YES
A/C engine fan control circuit
faulty.
A/C condenser faulty.
A/C expansion valve faulty.
A/C system overcharged.
A/C system leaking.
A/C receiver/dryer faulty.
A/C evaporator faulty.
A/C binary switch faulty.
0042 00-4