Piper Dakota Maintenance Manual page 133

CHART 2102. TROUBLESHOOTING (AIR CONDITIONING SYSTEM)
Trouble
Condenser door will not
close when air conditioner
switch is in OFF
position.
System produces no
cooling.
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
Cause
Faulty relay K-2.
Electrical
Blown fuse in control head.
Open circuit breaker.
Broken or disconnected
electrical wire.
Broken or disconnected
ground wire.
Clutch coil burned out or
disconnected.
Thermostat sensing element
defective,
Blower motor disconnected
or burned out.
Mechanical
Loose or broken drive belt.
Compressor partially or
completely frozen.
Expansion valve stuck in
open position.
1F20
Remedy
Replace relay.
Replace fuse
Reset circuit breaker.
Check all terminals for loose
connections; check wiring for
hidden breaks.
Check ground wire to see if
loose, broken, or discon
nected.
Check current flow to clutch.
replace if inoperative.
Check thermostat and cabin
comfort control panel.
Check current-flow to blower
motor. Repair or replace if
inoperative.
Replace drive belts or
tighten to specifications.
Remove compressor for
service or replacement.
Replace expansion valve.
21 - 52 - 00
Page - 21 - 06
Reissued: August 1, 1986