GMC 1976 ZEO 6083 Maintenance Manual page 836

The GMC MotorHome is equipped with a num-
ber of exhaust vents, these include:
* The range/oven power hood vent to remove
cooking odors and gases. The switch is on the fan.
* The power bath vent for ventilation . The con-
trol switch is on the vent .
One or two ceiling vents (depending whether
the vehicle is equipped with roof mounted air condi-
tioning) to allow warm air to escape that may ac
cumulate at ceiling level when the vehicle is parked
in the sun . The opening of a ceiling vent and a win-
dow will aid in removing condensation from the win-
dows .
The range/oven exhaust vent fan, the bath ex-
haust vent fan, and the ceiling vents with power fans
are all operated by 12-volts living area electricity .
Should any of these fans refuse to work make sure
the living area battery is not dead . Next check the
fuses in the living area electrical compartment, then
REMOVAL
SECTION 24P
EXHAUST VENTS
DESCRIPTION
VENT MOTOR DIAGNOSIS
The vents are crank-operated from inside the
MotorHome. In rainy weather it is possible to leave
the ceiling vents open slightly for ventilation without
entry of water into the MotorHome (depending upon
the magnitude and direction of rain).
NOTE:
All windows and roof vents must be
tightly closed when operating the air conditioner
or furnace to obtain maximum cooling or heat-
ing.
Power fans are available for the ceiling vents. These
will increase the efficiency of the vent . They are ope-
rated by the button switch at the corner of the vent .
check to see that the motor is receiving power
through the switch at the motor. If power is available
at the motor but it still refuses to work remove the
motor and test it on a direct 12-volt source . Replace
motor if necessary .
RANGE/OVEN EXHAUST VENT
MOTOR REPLACEMENT
(FIGURE 1)
1 . Remove retaining nuts at light and fan switch
on bottom of exhaust hood .
2. Remove exhaust hood bottom assembly.
EXHAUST VENTS 24P- 1
3 . Remove two nuts holding motor mount to vent
housing.
4. Disconnect motor wire .
5. Remove motor mount and fan from motor.
INSTALLATION
1 . Install fan and mount to motor.