
6.7
Cab Air Troubleshooting
Symptom
Problem
Solution
Section
Burned out motor.
Burned out switch.
Motor shaft tight or
bearings worn.
Faulty wiring—loose or broken.
Blower fan will
not run.
Blower rotors in contact with
housing.
Contact Dealer.
Contact Dealer.
Dirty fresh air
fi
lter.
Clean fresh air
fi
lter.
Cleaning Engine
Air Filter Primary
Element, page 235
Dirty recirculating air
fi
lter.
Clean recirculating
fi
lter.
Cleaning Return
Air Cleaner, page
220
Evaporator clogged.
Clean evaporator.
Cleaning Air
Conditioning
Evaporator Core,
page 223
Blower fan
operating but no air
coming into cab.
Air
fl
ow passage blocked.
Remove blockage.
—
Heater shut-off valve at engine
closed.
Open valve.
Defective thermostat in engine
water outlet manifold.
Replace thermostat.
Heater temperature control
defective.
Replace control.
Heater not heating.
No thermostat in engine water
outlet manifold.
Install thermostat.
Contact Dealer.
Plugged drainage hose.
Blow out hose with compressed air.
—
Odor from air
louvers.
Dirty
fi
lters.
Clean
fi
lters.
Cleaning Engine
Air Filter Primary
Element, page 235
and
169890
331
Revision A
Summary of Contents for M105
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Page 28: ...SAFETY Figure 1 21 Safety Signs LH Side 169890 14 Revision A ...
Page 30: ...SAFETY Figure 1 23 Safety Signs RH Side 169890 16 Revision A ...
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Page 87: ...OPERATOR S STATION 169890 73 Revision A ...
Page 88: ...OPERATOR S STATION 169890 74 Revision A ...
Page 89: ...OPERATOR S STATION 169890 75 Revision A ...
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Page 92: ...OPERATOR S STATION Operating Information Screens 169890 78 Revision A ...
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Page 299: ...MAINTENANCE AND SERVICING Fuse Box Decal Figure 5 169 Fuse Decal 169890 285 Revision A ...
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