DRAFT
TB 9-2320-364-13&P-1
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued
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2.
KNOWN INFO
TEST OPTIONS
Power to AC system OK.
Audible test.
Does AC compressor clutch
AC heater/evaporator blower OK.
REASON FOR QUESTION
engage when engine start
AC control circuit OK (except for temperature
control and low pressure switches).
switch is turned on, when fan
If AC compressor clutch does
not engage, AC
control switch is set to an on
POSSIBLE PROBLEMS
compressor will not
position and temperature
operate.
AC condenser dryer desiccant contaminant in
control switch is set to the
AC refrigerant system.
coldest temperature position?
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AC refrigerant oil contaminant in AC
refrigerant system.
AC system charge low.
AC system leaking.
Restricted AC hoses.
AC compressor faulty.
Go to Step 21 of this
NO
Temperature control switch faulty.
fault.
AC expansion valve faulty.
Moisture in AC refrigerant system.
YES
Air or other contaminant in AC refrigerant
system.
AC condenser core faulty.
AC system overcharged.
AC condenser dryer faulty.
AC evaporator core faulty.
Low pressure switch faulty.
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0015-4