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 92 of 524
TB 9-2320-279-13-1
0012-6
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.
POSSIBLE PROBLEMS
AC heater/evaporator core blocked or
damaged.
AC temperature control switch temperature
probe damaged or installed incorrectly.
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.
3.
Is AC heater/evaporator core
free from damage and debris?
If AC heater/
evaporator core is
damaged, recover
R-134a refrigerant
(WP 0050).
Replace
AC heater/evaporator
core (WP 0030) and
AC condenser dryer
(WP 0025).
Evacuate
and charge system
(WP 0050).
Verify
repair, go to Step 27
of this fault.
If AC heater/
evaporator core is
blocked with debris,
remove blockage.
Verify repair, go to
Step 27 of this fault.
NO
YES
Read WARNING on
page 0012-7.
WARNING
TEST OPTIONS
Visual inspection.
REASON FOR QUESTION
If AC heater/evaporator core
is damaged or blocked,
AC system will not operate
properly.
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