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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KNOWN INFO

TEST OPTIONS

Power to fan control switch OK.

Visual inspection.

Blower operates.

REASON FOR QUESTION

Does AC condenser fan

AC condenser core not blocked or damaged.

operate when fan control

If AC condenser fan does not

AC compressor belts OK.

switch is set to an on position

operate, AC system will

AC heater/evaporator core not blocked or

not operate properly.

and temperature control

damaged.

switch is set to the coldest

AC temperature control switch temperature

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temperature position?

probe OK.

POSSIBLE PROBLEMS

Heater cable faulty.

AC cable faulty.

Defrost cable faulty.

AC compressor clutch faulty.

Go to Step 15 of this

AC harness wire 1154 faulty.

fault.

High pressure switch faulty.

AC harness wire 1156 faulty.

YES

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.

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