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 132 of 524
TB 9-2320-279-13-1
0012-46
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.
AC condenser motor power wire OK.
AC condenser motor ground wire OK.
AC condenser motor OK.
AC condenser assembly harness black wire
OK.
AC harness wire 1155 OK.
Fan control switch OK.
Wire 1156 OK.
AC harness wire 1156 OK.
AC temperature control switch OK.
AC condenser assembly harness green wire
OK.
POSSIBLE PROBLEMS
AC condenser motor solenoid faulty.
AC condenser motor solenoid ground wire
faulty.
23.
Is continuity measured
across AC condenser motor
solenoid ground wire?
Repair AC condenser
motor solenoid ground
wire (see Appendix A).
Verify repair, go to
Step 27 of this fault.
NO
YES
Read WARNING on
page 0012-47.
WARNING
Replace AC condenser motor
solenoid (WP 0027).
Verify
repair, go to Step 27 of this
fault.
TEST OPTIONS
Continuity test.
Multimeter.
REASON FOR QUESTION
If continuity is measured, AC
condenser motor solenoid
is faulty.
If not, AC
condenser motor solenoid
ground wire is faulty.
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