MacDon M205 - Cab Air Troubleshooting

214603 436 Revision A
6.7 Cab Air Troubleshooting
Symptom
Problem
Solution Reference
Blower fan will
not run
Burned out motor
Contact Dealer. Contact Dealer
Blower fan will
not run
Burned out switch
Contact Dealer. Contact Dealer
Blower fan will
not run
Motor shaft tight or
bearings worn
Contact Dealer. Contact Dealer
Blower fan will
not run
Faulty wiring—loose or broken
Contact Dealer. Contact Dealer
Blower fan will
not run
Blower rotors in contact with
housing
Contact Dealer. Contact Dealer
Blower fan
operating but no
air coming into cab
Dirty fresh air filter Clean fresh air filter.
Inspecting and
Cleaning Fresh Air
Filter Element,
page 304
Blower fan
operating but no
air coming into cab
Dirty recirculating air filter Clean recirculating filter.
Cleaning Return
Air Cleaner/Filter,
page 306
Blower fan
operating but no
air coming into cab
Evaporator clogged
Clean evaporator.
Cleaning Air
Conditioning (A/C)
Evaporator Core,
page 308
Blower fan
operating but no
air coming into cab
Air flow passage blocked
Remove blockage.
—
Heater not heating
Heater shut-off valve at
engine closed
Open valve.
3.10.1 Heater
Shut-Off, page 58
Heater not heating
Defective thermostat in engine
water outlet manifold
Replace thermostat.
Contact Dealer
Heater not heating
Heater temperature control
defective
Replace control.
Contact Dealer
Heater not heating
No thermostat in engine water
outlet manifold
Install thermostat.
Contact Dealer
Odor from air
louvers
Plugged drainage hose Blow out hose with compressed air.
—
Odor from air
louvers
Dirty filters Clean filters.
Cleaning Return
Air Cleaner/Filter,
page 306
Air conditioning not
cooling
Low refrigerant level Add refrigerant. Contact Dealer. Contact Dealer
Air conditioning not
cooling
Clutch coil burned out or
disconnected
Contact Dealer. Contact Dealer
TROUBLESHOOTING