Oven/Bake Under Temperature (Diagnostic Chart) - GE SCA1000 Technical Service Manual

Check Thermistor.
Replace
NO
thermistor.
Thermistor OK?
Replace main
YES
PCB.
Oven/Bake Under Temperature
Perform Damper
Door Test.
YES YES
Pass test?
NO
Repair or replace
damper.
YES
Check fuse on sub
PCB.
Fuse OK?
YES
Check resistance
of sheath heater.
Heater OK?
YES
Check relay RY7
on sub PCB.
Relay OK?
YES
Open in the upper
heater circuit.
– 45 –
Set Oven/Bake for
250° F. See Display Does
NO Not Operate
Does preheat Correctly chart.
display?
YES
Do sheath and
lower heaters
come on?
NO
Check resistance
Does lower heater of lower heater.
NO
come on?
Heater OK?
NO Replace fuse.
Check relay RY9
on main PCB.
NO Replace heater.
Open lower heater
Check harness and
connectors between
sub PCB and main
NO PCB. If OK, replace
sub PCB. If problem
not corrected, replace
main PCB.
NO Replace heater.
YES
Replace main
NO
PCB.
Relay OK?
YES
circuit.