DRAFT
TB 9-2320-364-13&P-1
AC DOES NOT COOL OR COOLS INADEQUATELY - Continued
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WARNING
20.
KNOWN INFO
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Read WARNING on
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Power to AC system OK.
TEST OPTIONS
AC heater/evaporator blower OK.
AC control circuit OK (except for temperature
Visual inspection.
control and low pressure switches).
Is AC expansion valve free
REASON FOR QUESTION
Low pressure switch OK.
from excessive sweating and
No AC condenser dryer desiccant
If AC expansion valve is free
contaminant in AC refrigerant system.
frost?
from excessive sweating
No AC refrigerant oil contaminant in AC
and frost, AC evaporator
refrigerant system.
core is faulty. If not, AC
expansion valve is faulty.
AC system charge is not low.
No AC system leaks.
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Temperature control switch OK.
Recover R-134a
No air or other contaminant in AC refrigerant
refrigerant (WP 0053).
system.
Replace AC expansion
AC compressor OK.
valve (WP 0030) and
No moisture in AC refrigerant system.
AC condenser dryer
AC condenser core OK.
NO
(WP 0024). Evacuate
AC system not overcharged.
and charge system
AC condenser dryer OK.
(WP 0053). Verify
repair, go to Step 22 of
No restricted AC hoses.
YES
this fault.
POSSIBLE PROBLEMS
AC expansion valve faulty.
AC evaporator core faulty.
Recover R-134a refrigerant
(WP 0053). Replace AC
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evaporator core (WP 0030)
and AC condenser dryer
(WP 0024). Evacuate and
charge system (WP 0053).
Verify repair, go to Step 22 of
this fault.
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0015-30