MacDon M105 Operator's Manual page 346

Symptom Problem
Low refrigerant level.
Compressor clutch coil burned
out or disconnected.
Blower motor disconnected or
burned out.
Switch contacts in thermostat
burned excessively, or sensing
element defective.
Compressor partially or
completely seized.
Condenser fins plugged.
Loose or broken compressor
drive belt.
Air conditioning not
cooling.
Dirty filters. Plugged filters.
Broken or disconnected
electrical wire.
Broken or disconnected
ground wire.
Expansion valve stuck in open
or closed position.
Broken refrigerant line.
Leak in system.
Compressor shaft seal leaking.
Clogged screen in
receiver-drier; plugged hose
or coil.
169890
TROUBLESHOOTING
Solution
Add refrigerant. Contact Dealer.
Contact Dealer.
Replace thermostat.
Remove compressor for service or
replacement.
Clean condenser.
Replace drive belt and/ or tighten to
specifications.
Clean fresh air and recirculation
filters.
Check all terminals for loose
connections; check wiring for hidden
breaks.
Check ground wire to see if loose,
broken, or disconnected.
Contact Dealer.
332
Section
Contact Dealer.
Air Conditioning
Condenser, page
221
Tensioning Air
Conditioner (A/C)
Compressor Belt,
page 257
and
Replacing Air
Conditioner A/C
Compressor Belt,
page 257
Cleaning Engine
Air Filter Primary
Element, page 235
and
Cleaning
Return Air Cleaner,
page 220
—
Contact Dealer.
Revision A