Piper Dakota Maintenance Manual page 134

CHART 2102. TROUBLESHOOTING (AIR CONDITIONING SYSTEM) (cont)
Trouble
System produces no
cooling, (cont)
System will not produce
sufficient cooling.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
Cause
Refrigeration
Broken refrigerant line.
Leak in system.
Compressor shaft seal
leaking.
Clogged screen or screens in
receiver dehydrator or ex-
pansion valve; plugged hose
or coil.
Electrical
Blower motor sluggish in
operation.
Mechanical
Compressor clutch slipping.
Obstructed blower passage.
Insufficient air circulation
over condenser coils; fins
clogged with dirt or bugs.
Evaporator filter clogged.
1F21
Remedy
Examine all lines for evidence
of breakage by external stress
or rubbing wear.
Evacuate system, apply static
charge, leak test system, and
repair leak as necessary.
Replace compressor.
Repair as necessary.
Remove blower motor for
service or replacement.
Remove clutch assembly for
service or replacement.
Examine entire passage for
obstruction. Correct as
necessary.
Clean condenser coils.
Clean with cleaning solvent
to remove cigarette tars.
21 - 52 - 00
Page - 21 - 07
Reissued: August 1, 1986