DRAFT
TB 9-2320-364-13&P-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 circuit OK (except for temperature
Does AC condenser dryer
REASON FOR QUESTION
control and low pressure switches).
sight glass indicate system is
Low pressure switch OK.
If AC condenser dryer sight
free from desiccant
glass indicates desiccant
POSSIBLE PROBLEMS
breakdown and oil?
breakdown or oil in
system, system must be
AC condenser dryer desiccant contaminant in
flushed.
AC refrigerant system.
AC refrigerant oil contaminant in AC
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refrigerant system.
AC system charge low.
Perform leak test
AC system leaking.
(WP 0052). Recover
Restricted AC hoses.
NO
R-134a refrigerant
AC compressor faulty.
(WP 0053). Repair
any leaks found.
Temperature control switch faulty.
Flush system
AC expansion valve faulty.
YES
(WP 0053). Replace
Moisture in AC refrigerant system.
AC condenser dryer
Air or other contaminant in AC refrigerant
system.
Evacuate and charge
AC condenser core faulty.
system with new
AC system overcharged.
R-134a refrigerant
(WP 0053). Go to
AC condenser dryer faulty.
Step 4 of this fault.
AC evaporator core faulty.
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0015-6
