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 96 of 524
TB 9-2320-279-13-1
0012-10
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.
POSSIBLE PROBLEMS
Heater cable faulty.
AC cable faulty.
Defrost cable faulty.
AC compressor clutch faulty.
AC harness wire 1154 faulty.
High pressure switch faulty.
AC harness wire 1156 faulty.
AC harness wire 1158 faulty.
Low pressure switch 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.
5.
Does AC condenser fan
operate when fan control
switch is set to an on position
and temperature control
switch is set to the coldest
temperature position?
Go to Step 15 of this
fault.
NO
YES
TEST OPTIONS
Visual inspection.
REASON FOR QUESTION
If AC condenser fan does not
operate, AC system will
not operate properly.
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