AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM DUCTS DURING AC OPERATIONS (Cont)

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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17.

WARNING

KNOWN INFO

TEST OPTIONS

Read WARNING on

Power to fan control switch OK.

page 0012-35.

Voltage test.

Blower operates.

Multimeter.

AC condenser core not blocked or damaged.

REASON FOR QUESTION

Are 22 to 28 vdc measured on

AC compressor belts OK.

AC condenser motor

AC heater/evaporator core not blocked or

If 22 to 28 vdc are not

damaged.

solenoid, terminal red wire,

measured, AC condenser

motor solenoid is faulty.

when fan control switch is set

AC temperature control switch temperature

probe OK.

to an on position and

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Heater cable OK.

temperature control switch is

set to the coldest temperature

AC cable OK.

position?

Defrost cable OK.

AC compressor clutch OK.

AC harness wire 1154 OK.

Low pressure switch OK.

AC harness wire 1158 OK.

Replace AC

High pressure switch OK.

condenser motor

solenoid (WP 0027).

AC harness wire 1156 OK.

Verify repair, go to

AC condenser assembly harness green wire

Step 27 of this fault.

OK.

YES

AC condenser motor solenoid ground wire

OK.

Fan control switch OK.

Wire 1156 OK.

AC temperature control switch OK.

AC condenser assembly harness black wire

OK.

AC harness wire 1155 OK.

POSSIBLE PROBLEMS

AC condenser motor solenoid faulty.

AC condenser motor power wire faulty.

AC condenser motor ground wire faulty.

AC condenser motor faulty.

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0012-34