Oven Sensor Ohmmeter Test; Convection Fan Troubleshooting - GE Profile PT925 Technical Service Manual

Convection Fan Troubleshooting

Problem
Fan motor buzzes Open capacitor
Open winding as
indicated by ohm
check red to black and
blue to black (approx.
60 ohms each)
Check voltage CCW
to N when fan is CCW
- should read 120VAC
No fan operation
in Convection Bake.
Also, CW to N when CW
as indicated by ERC
display
Shaft or blade rubbing
on oven liner
Jamb switch NC to C is
open
Loose shaft nut
Fan loud
Loose convect cover
screws or cavity screws

Oven Sensor Ohmmeter Test

Remove ribbon cable from the upper oven door. Make resistance measurements of the sensors with the
exposed terminals of the ribbon cable.
Upper Oven
Pin 13 to pin 14
Sensor
Lower Oven
Pin 11 to pin 12
Sensor
Possible Causes
Harness, terminals, or bad capacitor.
Replace motor.
•
•
Loosen screws/re-adjust position/tighten.
Replace jamb switch or check harness.
Tighten shaft nut. Do not bend blade.
Tighten screws. Use larger screw if stripped.
Room temp - 1080 ohms
Clean temp - 2650 ohms
What To Do
If no voltages, replace ERC.
If voltages OK, check harness or winding resistance.
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