GE JS998 Series - Convection Element Not Working Troubleshooting

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Convection Element Does Not Work
Enter the service mode and turn
the convection element on.
Is the convection element on?
No
Disconnect the convection element. Is
240 VAC present from the MPB relay
K10 NO to K102 COM contacts?
Yes
No
Is 240 VAC present from the MPB
relay K10 NO to K102 NO contacts?
No
Yes
Yes
Is 4.2 VDC present from the MPB
connectors J1, pin 1 to J3, pin 2?
No
Yes
Repair the faulty
wiring from the
MLB to MPB.
No
Is 240 VAC present at the
convection element connectors?
Replace the
convection element.
Repair the faulty wiring
from the MPB to the
convection element.
Yes
No
Replace
the MPB.
Is 240 VAC present from the MPB
relay K10 COM to K102 NO contacts?
Repair the faulty
wiring from the
input of L1 or L2.
No
Is 4.6 VDC present from the MLB
connectors J3, pin 12 to J5, pin 2?
Yes
Replace
the MLB.
Is 4.6 VDC present from the MPB
connectors J1, pin 12 to J3, pin 2?
Is 4.2 VDC present from the MLB
connectors J3, pin 1 to J5, pin 2?
Replace
the MLB.
No
Yes
No
Yes
Is 4.6 VDC present from the MLB
connectors J3, pin 8 to J5, pin 2?
Yes
Is 4.6 VDC present from the MPB
connectors J1, pin 8 to J3, pin 2?
Repair the faulty
wiring from the
MLB and MPB.
No
Yes
Replace
the MPB.
Repair the faulty
wiring from the
MLB to MPB.
Replace
the MLB.
No