TB 9-2320-360-13&P-1
A/C DOES NOT OPERATE
13.
KNOWN INFO
WARNING
Read WARNING on
Power to A/C system OK.
page 0042 00-19.
A/C circuit wiring OK.
A/C controls OK (except for A/C
Is A/C evaporator and system
binary switch and A/C
low side A/C hose at A/C
thermostatic switch).
evaporator free from
A/C receiver/dryer moisture
TEST OPTIONS
indicator indicates no moisture in
excessive sweating and
Visual Inspection.
system.
frost?
A/C binary switch OK.
REASON FOR QUESTION
A/C receiver/dryer sight glass
If evaporator and system low side
indicates no desiccant
A/C hose at evaporator are free
breakdown or oil in system.
from excessive sweating and
A/C system is not leaking.
frost, A/C system may be
A/C system charge is not low.
Replace A/C expansion
overcharged, if not, A/C
A/C thermostatic switch OK.
valve (WP 0049 00), A/C
expansion valve may be faulty.
NO
No air or other contaminant in A/C
receiver/dryer (WP 0054 00)
system.
and R-134a (WP 0056 00).
A/C compressor OK.
Verify repair, go to Step 23
YES
A/C hoses are not restricted.
of this fault.
A/C receiver/dryer OK.
A/C evaporator OK.
A/C engine fan control circuit OK.
A/C condenser OK.
Replace A/C receiver/
dryer (WP 0054 00) and
POSSIBLE PROBLEMS
R-134a (WP 0056 00).
A/C expansion valve faulty.
Verify repair, go to
A/C system overcharged.
Step 23 of this fault.
14.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING on
Power to A/C system OK.
Visual Inspection.
page 0042 00-19.
A/C circuit wiring OK.
REASON FOR QUESTION
A/C controls OK (except for A/C
Is A/C hose from A/C low side
If frost or cool spots are forming on
binary switch and A/C
A/C hoses, A/C hoses are
service valve to A/C
thermostatic switch).
restricting R-134a flow.
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 leaking.
Replace restricted A/
A/C system charge is not low.
C hose (WP 0052 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
A/C receiver/dryer OK.
00). Verify repair, go
A/C evaporator OK.
YES
to Step 23 of this fault.
A/C engine fan control circuit OK.
A/C condenser OK.
A/C system is not overcharged.
POSSIBLE PROBLEMS
A/C compressor faulty.
Restricted A/C hose.
A/C expansion valve faulty.
0042 00-18