MacDon M105 - Page 346

TROUBLESHOOTING
Symptom
Problem
Solution Section
Low refrigera
nt level.
Add refrigera
nt. Contact Dealer.
Compressor clutch coil burned
out or disconnected.
Blower motor
disconnected or
burned out.
Contact Dealer.
Switch contacts in thermostat
burned excessively, or sensing
element defective.
Replace thermostat.
Compressor partially or
completely seized.
Remove compressor for service or
replacement.
Contact Dealer.
Condense
r fins plugged.
Clean con
denser.
Air Condi
tioning
Condense
r, page
221
Loose or broken compressor
drive belt.
Replace drive belt and/ or tighten to
specifications.
Tensioning Air
Conditioner (A/C)
Compressor Belt,
page 257
and Replacing Air
Conditioner A/C
Compressor Belt,
page 257
Dirty
filters. Plugged filters.
Clean
fresh air and recirculation
filte
rs.
Clean
ing Engine
Air Fi
lter Primary
Eleme
nt, page 235
and C
leaning
Retu
rn Air Cleaner,
page
220
Broken or disconnected
electrical wire.
Check all terminals for loose
connectio ns; check wiring for hid d en
breaks.
Broken or disconnected
ground wire.
Checkgroundwiretoseeifloose,
broken, or disconnected.
—
Expansion valve stuck in open
or closed position.
Broken refrigerant line.
Leak in system.
Compressor shaft seal leaking.
Air conditioning not
cooling.
Clogged screen in
receiver-drier; plugged hose
or coil.
C
ontact Dealer.
C
ontact Dealer.
169890 332 Revision A