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

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

12.

KNOWN INFO

TEST OPTIONS

Read WARNING on

Power to fan control switch OK.

page 0012-25.

Voltage test.

Blower operates.

Multimeter.

AC condenser core not blocked or damaged.

Are 22 to 28 vdc measured on

AC compressor belts OK.

REASON FOR QUESTION

AC harness wire 1158 at low

AC heater/evaporator core not blocked or

pressure switch connector,

To isolate system fault.

damaged.

when fan control switch is set

Temperature control switch temperature

to an on position and

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probe OK.

temperature control switch is

AC harness wire 1155 OK.

set to the coldest temperature

AC condenser assembly harness black wire

position?

OK.

AC condenser motor solenoid OK.

AC condenser motor red wire OK.

AC condenser motor ground wire OK.

AC condenser motor OK.

Connect AC harness

pressure switch

AC condenser assembly harness green wire

connector, and go to

OK.

Step 14 of this fault.

AC condenser motor solenoid ground wire

OK.

YES

Fan control switch OK.

Wire 1156 OK.

Temperature control switch OK.

Heater cable OK.

AC cable OK.

Defrost cable OK.

AC harness wire 1435 OK.

AC compressor clutch OK.

POSSIBLE PROBLEMS

AC harness wire 1154 faulty.

Low pressure switch faulty.

AC harness wire 1156 faulty.

AC harness wire 1158 faulty.

High pressure switch faulty.

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0012-24