AC COMPRESSOR DOES NOT SHUT OFF OR CYCLES CONSTANTLY - Continued

DRAFT

TB 9-2320-279-13-1

AC COMPRESSOR DOES NOT SHUT OFF OR CYCLES CONSTANTLY - Continued

WARNING

Remove rings, bracelets, wristwatches, neck chains, and any other jewelry before working around

vehicle. Jewelry can catch on equipment and cause serious injury. Jewelry or tools may short

across electrical circuits or terminals and cause damage to equipment or severe burns or

electrical shock to personnel.

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

VISUAL INSPECTION

NOTE: Temperature control switch temperature probe

is installed correctly when it is inserted into the AC

heater/evaporator core until it touches the bottom of the

insertion hole.

(1) Remove eight screws and top heater cover

(WP 0037).

(2) Inspect temperature control switch temperature

probe for damage.

(a) If temperature control switch temperature probe

is damaged, replace temperature control switch

(WP 0044). Verify repair, go to Step 14 of this

fault.

(3) Check if temperature control switch temperature

probe is installed correctly.

(a) If temperature control switch temperature probe

is installed incorrectly, reinstall temperature

control switch temperature probe (WP 0044).

Verify repair, go to Step 14 of this fault.

(b) If temperature control switch temperature probe

is installed correctly, go to work package 0015

(AC Does Not Cool Or Cools Inadequately).

AUDIBLE TEST

NOTE: Do not start engine during this procedure. AC

condenser motor solenoid operation will be checked by

listening for a clicking sound from the AC condenser

motor solenoid when the engine start switch is turned to

ON position.

(1) Remove four screws, lockwashers, washers, and

cover from AC condenser assembly (WP 0028).

(2) Turn fan control switch to an on position (low,

medium, or high) (WP 0004).

(3) Turn temperature control switch to the coldest

position (fully clockwise) (WP 0004).

(4) While assistant turns engine start switch ON

(TM 9-2320-279-10), check operation of AC

condenser motor solenoid by listening for a click

when engine start switch is turned ON.

(a) If AC condenser motor solenoid is not

energized, turn engine start switch OFF and go

to Step 11 of this fault.

(b) If AC condenser motor solenoid is energized,

go to Step 6 of this fault.

HEMAC171

0014-7