TB 9-2320-360-13&P-1
A/C DOES NOT OPERATE
KNOWN INFO
18.
WARNING
Read WARNING on
Power to A/C system OK.
page 0042 00-25.
A/C circuit wiring OK.
A/C controls OK (except for A/C
Is A/C receiver/dryer free from
binary switch and A/C
frost, sweating, and cool
thermostatic switch).
spots?
A/C receiver/dryer moisture
TEST OPTIONS
indicator indicates no moisture in
Visual Inspection.
system.
A/C binary switch OK.
REASON FOR QUESTION
A/C receiver/dryer sight glass
If A/C receiver/dryer is free from
indicates no desiccant
frost and cool spots, A/C
breakdown or oil in system.
expansion valve is faulty; if not,
A/C system is not leaking.
A/C receiver/dryer is faulty.
Replace A/C receiver/
A/C system charge is not low.
dryer (WP 0054 00) and
A/C thermostatic switch OK.
R-134a (WP 0056 00).
No air or other contaminant in A/C
NO
Verify repair, go to
system.
Step 23 of this fault.
A/C compressor OK.
A/C engine fan control circuit OK.
YES
A/C condenser OK.
A/C system is not overcharged.
Replace A/C expansion valve
A/C evaporator OK.
(WP 0049 00), A/C receiver/
A/C hose are not restricted.
dryer (WP 0054 00), and
POSSIBLE PROBLEMS
R-134a (WP 0056 00). Verify
A/C expansion valve faulty.
repair, go to Step 23 of this
A/C receiver/dryer faulty.
fault.
19.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING on
Power to A/C system OK.
Visual Inspection.
page 0042 00-25.
A/C circuit wiring OK.
REASON FOR QUESTION
A/C controls OK (except for A/C
Are A/C hoses from A/C
If frost or cool spots are forming on
binary switch and A/C
A/C hoses, R-134a flow is being
evaporator to A/C
thermostatic switch).
restricted.
compressor free from frost
A/C receiver/dryer moisture
indicator indicates no moisture in
and cool spots?
system.
A/C binary switch OK.
A/C receiver/dryer sight glass
indicates no desiccant
breakdown or oil in system.
A/C system is not leading.
Replace restricted A/C hose
A/C system charge is not low.
(WP 0052 00), A/C receiver/
A/C thermostatic switch OK.
dryer (WP 0054 00), and
No air or other contaminant in A/C
NO
R-134a (WP 0056 00). Verify
system.
repair, go to Step 23 of this
A/C compressor OK.
fault.
A/C engine fan control circuit OK.
YES
A/C condenser OK.
A/C system is not overcharged.
A/C receiver/dryer OK.
POSSIBLE PROBLEMS
Restricted A/C hose.
A/C expansion valve faulty.
A/C evaporated faulty.
0042 00-24
