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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15.

WARNING

KNOWN INFO

TEST OPTIONS

Read WARNING on

Power to fan control switch OK.

page 0012-31.

Audible test.

Blower operates.

AC condenser core not blocked or damaged.

REASON FOR QUESTION

Is AC condenser motor

AC compressor belts OK.

solenoid energized when

To isolate system fault.

AC heater/evaporator core not blocked or

engine start switch is turned

damaged.

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on, when fan control switch is

AC temperature control switch temperature

set to an on position and

probe OK.

temperature control switch is

Heater cable OK.

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.

High pressure switch OK.

Go to Step 21 of this

fault.

POSSIBLE PROBLEMS

AC harness wire 1156 faulty.

YES

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.

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0012-30