TB-9-2320-279-13-1
TECHNICAL BULLETIN; AIR CONDITIONING SYSTEM
OPERATOR’S, UNIT AND DIRECT SUPPORT MAINTENANCE MANUAL, INSTALLATION INSTRUCTIONS, AND REPAIR PARTS AND SPECIAL TOOLS LISTS
DECEMBER 2005
TB-9-2320-279-13-1 - Page 116 of 524
TB 9-2320-279-13-1
0012-30
AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM
DUCTS DURING AC OPERATIONS - Continued
DRAFT
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KNOWN INFO
Power to fan control switch OK.
Blower operates.
AC condenser core not blocked or damaged.
AC compressor belts OK.
AC heater/evaporator core not blocked or
damaged.
AC temperature control switch temperature
probe OK.
Heater cable OK.
AC cable OK.
Defrost cable OK.
AC compressor clutch OK.
AC harness wire 1154 OK.
Low pressure switch OK.
AC harness wire 1158 OK.
High pressure switch OK.
POSSIBLE PROBLEMS
AC harness wire 1156 faulty.
AC condenser motor solenoid faulty.
AC condenser motor power wire faulty.
AC condenser motor ground wire faulty.
AC condenser motor faulty.
AC condenser assembly harness black wire
faulty.
AC harness wire 1155 faulty.
AC condenser assembly harness green wire
faulty.
AC condenser motor solenoid ground wire
faulty.
Fan control switch faulty.
Wire 1156 faulty.
AC temperature control switch faulty.
15.
Is AC condenser motor
solenoid energized when
engine start switch is turned
on, when fan control switch is
set to an on position and
temperature control switch is
set to the coldest temperature
position?
Go to Step 21 of this
fault.
NO
YES
Read WARNING on
page 0012-31.
WARNING
TEST OPTIONS
Audible test.
REASON FOR QUESTION
To isolate system fault.
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