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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AUDIBLE TEST

NOTE: Do not start engine during this procedure. AC

compressor clutch operation will be checked by listening

for a clicking sound from the AC compressor when the

engine start switch is turned to ON position.

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

medium, or high) (WP 0004).

(2) Turn temperature control switch to the coldest

position (fully clockwise) (WP 0004).

(3) While assistant turns engine start switch ON

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

compressor clutch by listening for a click when

engine start switch is turned ON.

(a) If AC compressor clutch does not engage, turn

engine start switch OFF and go to Step 10 of

this fault.

(b) If AC compressor clutch engages, turn engine

start switch OFF and go to Step 7 of this fault.

HEMAC149

0012-13