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DRAFT
TB 9-2320-279-13-1
AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM
DUCTS DURING AC OPERATIONS - Continued
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WARNING
11.
KNOWN INFO
TEST OPTIONS
Read WARNING on
Power to fan control switch OK.
Voltage test.
Blower operates.
AC condenser core not blocked or damaged.
Are 22 to 28 vdc measured on
REASON FOR QUESTION
AC compressor belts OK.
AC harness wire 1158 at low
AC condenser motor solenoid OK.
To isolate system fault.
pressure switch connector,
AC condenser motor power wire OK.
when fan control switch is set
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
to an on position and
AC condenser motor ground wire OK.
temperature control switch is
AC condenser motor OK.
set to the coldest temperature
AC condenser assembly harness black wire
position?
OK.
AC harness wire 1155 OK.
AC condenser assembly harness green wire
OK.
AC condenser motor solenoid ground wire
OK.
Connect AC harness
pressure switch
Fan control switch OK.
NO
connector, and go to
Wire 1156 OK.
Step 13 of this fault.
AC temperature control switch OK.
YES
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.
POSSIBLE PROBLEMS
AC harness wire 1154 faulty.
Low pressure switch faulty.
AC harness wire 1156 faulty.
AC harness wire 1158 faulty.
High pressure switch faulty.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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