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

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

24.

WARNING

KNOWN INFO

TEST OPTIONS

Read WARNING on

Power to fan control switch OK.

page 0012-49.

Voltage test.

Blower operates.

Multimeter.

AC condenser core not blocked or damaged.

REASON FOR QUESTION

Are 22 to 28 vdc measured on

AC compressor belts OK.

fan control switch, terminal C

AC heater/evaporator core not blocked or

If 22 to 28 vdc are not

damaged.

(wire 1156), when fan control

measured, fan control

switch is faulty.

switch is set to an on

AC temperature control switch temperature

probe OK.

position?

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Heater cable OK.

AC cable OK.

Defrost cable OK.

AC compressor clutch OK.

AC harness wire 1154 OK.

Low pressure switch OK.

AC harness wire 1158 OK.

Replace fan control

High pressure switch OK.

switch (WP 0031).

AC condenser motor power wire OK.

Verify repair, go to

AC condenser motor ground wire OK.

Step 27 of this fault.

AC condenser motor OK.

YES

AC condenser assembly harness black wire

OK.

AC harness wire 1155 OK.

AC condenser assembly harness green wire

OK.

AC condenser motor solenoid OK.

AC condenser motor solenoid ground wire

OK.

POSSIBLE PROBLEMS

Fan control switch faulty.

Wire 1156 faulty.

AC harness wire 1156 faulty.

AC temperature control switch faulty.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

0012-48