Vent Fan Does Not Operate In One Or Both Speeds Or Does Not Turn Off (Using Vent Fan Button) (Diagnostic Chart) - GE SCA1000 Technical Service Manual

Note: This oven is equipped with an Automatic Fan feature. If cabinet or cavity temperature is
high, the vent fan will automatically operate at a low speed. The fan cannot be turned off and
will stop automatically.
Normal operation. YES
Vent Fan Does Not Operate in One or Both Speeds
or Does Not Turn Off (Using Vent Fan Button)
Attempt to turn off
vent fan using
Vent Fan button.
YES
Does vent fan turn
off?
NO
Replace main
PCB.
Check vent fan
Check ribbon between main
PCB and sub PCB.
If ribbon is OK, replace sub
PCB. If not fixed, replace main
PCB.
Attempt to turn on vent
fan using Vent Fan
button.
Does vent fan turn on
and stay on?
Mute beeper using
motor and YES
the vent fan button
capacitor.
YES
YES
Does control panel
– 48 –
Vent fan operates only
when button is pressed.
NO
Replace main PCB.
Vent fan does not
operate in one or
both speeds.
Options.
Listen for a relay
click every time
is pushed.
Does relay click
every time?
NO
Does vent fan
operate in one
speed only?
NO
Perform Control
Panel Test.
pass test?
NO
Replace control
panel.