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DRAFT
TB 9-2320-279-13-1
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued
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WARNING
3.
KNOWN INFO
TEST OPTIONS
Read WARNING on
Power to AC system OK.
Visual inspection.
AC heater/evaporator blower OK.
AC test set manifold gages.
AC control circuits OK (except for
Does AC condenser dryer
REASON FOR QUESTION
temperature control and low pressure
sight glass indicate system is
switches).
If AC condenser dryer sight
AC low pressure switch OK.
free from desiccant
glass indicates desiccant
breakdown and oil?
breakdown or oil in
POSSIBLE PROBLEMS
system, system must be
flushed.
AC condenser dryer desiccant contaminant in
AC refrigerant system.
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AC refrigerant oil contaminant in AC
refrigerant system.
Perform leak test
Restricted AC hose.
(WP 0049). Recover
AC compressor faulty.
NO
R-134a refrigerant
Temperature control switch faulty.
(WP 0050). Repair
Moisture in AC refrigerant system.
any leaks found.
Flush system
Air or other contaminant in AC refrigerant
YES
(WP 0050). Replace
system.
AC condenser dryer
AC condenser core faulty.
AC expansion valve faulty.
Evacuate and charge
AC system overcharged.
system with new
AC condenser dryer faulty.
R-134a refrigerant
AC evaporator core faulty.
(WP 0050). Go to
Step 4 of this fault.
AC system charge low.
AC system leaking.
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0015-6
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