AC DOES NOT COOL OR COOLS INADEQUATELY - continued

DRAFT

TB 9-2320-364-13&P-1

AC DOES NOT COOL OR COOLS INADEQUATELY - Continued

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WARNING

12.

KNOWN INFO

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Read WARNING on

TEST OPTIONS

Power to AC system OK.

page 0015-19.

AC heater/evaporator blower OK.

Visual inspection.

AC control circuit OK (except for temperature

REASON FOR QUESTION

Are AC evaporator core and

control and low pressure switches).

system low-side AC hose at

Low pressure switch OK.

If AC evaporator core and

AC evaporator core free from

No AC condenser dryer desiccant

system low-side AC hose

contaminant in AC refrigerant system.

at AC evaporator core are

excessive sweating and

not free from excessive

No AC refrigerant oil contaminant in AC

frost?

sweating and frost, AC

refrigerant system.

expansion valve is faulty

AC system charge is not low.

or moisture may have

No AC system leaks.

entered system.

Temperature control switch OK.

Recover R-134a

No air or other contaminant in AC refrigerant

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refrigerant (WP 0053).

system.

Replace AC expansion

AC condenser dryer OK.

valve (WP 0030) and

AC evaporator core OK.

AC condenser dryer

No restricted AC hoses.

(WP 0024). Evacuate

YES

AC compressor OK.

and charge system

(WP 0053). Verify

POSSIBLE PROBLEMS

repair, go to Step 22 of

this fault.

AC expansion valve faulty.

Moisture in AC refrigerant system.

AC condenser core faulty.

AC system overcharged.

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0015-18