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

AC condenser core not blocked or damaged.

Are AC compressor belts

If AC compressor belts are

tight and free from damage?

POSSIBLE PROBLEMS

missing, loose, or

damaged, AC compressor

AC compressor belts loose or damaged.

will not operate properly.

AC heater/evaporator core blocked or

damaged.

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AC temperature control switch temperature

probe damaged or installed incorrectly.

Heater cable faulty.

AC cable faulty.

Replace or tighten

Defrost cable faulty.

AC compressor belts

as required

AC compressor clutch faulty.

(WP 0022). Verify

AC harness wire 1154 faulty.

repair, go to Step 27

High pressure switch faulty.

of this fault.

YES

AC harness wire 1156 faulty.

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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0012-4