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

DRAFT

TB 9-2320-364-13&P-1

AC HEATER/EVAPORATOR BLOWER OPERATES BUT NO COLD AIR FROM

DUCTS DURING AC OPERATIONS - Continued

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WARNING

19.

KNOWN INFO

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Read WARNING on

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Power to fan control switch OK.

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page 0012-39.

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Blower operates.

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AC condenser core not blocked or damaged.

TEST OPTIONS

Is AC condenser motor

AC compressor belts OK.

solenoid energized when

Audible test.

AC heater/evaporator core not blocked or

engine start switch is turned

damaged.

REASON FOR QUESTION

on, when fan control switch is

Temperature control switch temperature

set to an on position and

To isolate system fault.

probe OK.

temperature control switch is

Heater cable OK.

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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.

High pressure switch OK.

AC harness wire 1158 OK.

Go to Step 24 of this

NO

fault.

AC harness wire 1435 OK.

AC harness wire 1155 OK.

YES

Fan control switch OK.

Wire 1156 OK.

Temperature control switch OK.

AC harness wire 1156 OK.

POSSIBLE PROBLEMS

AC condenser assembly harness black wire

faulty.

AC condenser motor solenoid faulty.

AC condenser motor red wire faulty.

AC condenser motor ground wire faulty.

AC condenser motor faulty.

AC condenser assembly harness green wire

faulty.

AC condenser motor solenoid ground wire

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faulty.

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0012-38