TB 9-2320-360-13&P-1
A/C DOES NOT OPERATE
KNOWN INFO
20.
WARNING
Read WARNING on
Power to A/C system OK.
page 0042 00-27.
A/C circuit wiring OK.
A/C controls OK (except for A/C
Is A/C expansion valve free
binary switch and A/C
from excessive sweating and
thermostatic switch).
frost?
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 expansion valve is free from
indicates no desiccant
excessive sweating and frost, A/
breakdown or oil in system.
C evaporator is faulty; if not, A/C
A/C system is not leaking.
expansion valve is faulty.
Replace A/C expansion
A/C system charge is not low.
valve (WP 0049 00),
A/C thermostatic switch OK.
A/C receiver/dryer
No air or other contaminant in A/C
NO
(WP 0054 00), and
system.
R-134a (WP 0056 00).
A/C compressor OK.
Verify repair, go to Step
A/C engine fan control circuit OK.
YES
23 of this fault.
A/C condenser OK.
A/C system is not overcharged.
A/C receiver/dryer OK.
Replace A/C evaporator
A/C hoses are not restricted.
(WP 0050 00), A/C
POSSIBLE PROBLEMS
receiver/dryer (WP 0054
00), and R-134a (WP 0056
A/C expansion valve faulty.
00). Verify repair, go to
A/C evaporator faulty.
Step 23 of this fault.
0042 00-26
