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Brand:GE
Model Number:JGB700SEJ4SS
Main Symptom: Convect fan issues
What happens & when: Convect fan starts , runs for 4 seconds, stops, then repeats. Replaced the control board and the temp sensor, what’s next?
Also getting 34.0 Ohms on fan motor with no power to unit
Error Code (if any):
Parts or tests already tried: Control Board, Temperature sensor (WB20K10027)
Photos / video link:
That’s pretty normal. Most manufacturers don’t specify how long the fan is going to cycle on and then cycle off for, but it is a very short period.
4 seconds on, then off…over and over and over? I’ve cooked with other convection ovens, often they run for 20 seconds plus, then off, then on again for a different time.
With an ohm at 34, could the motor be bad…or at least going (bad)?
Continuous: Older models and some basic convection settings run the fan non-stop for maximum heat transfer and browning.
Cycling: Newer ovens often cycle the fan on and off (e.g., 20 seconds on, 5 seconds off) to maintain temperature precisely and save energy.
Fan-Assist: Some ovens have a “Fan-Forced” or “Convection Assist” mode where the fan runs full-time to speed up cooking.
You may be on to something with that resistance reading, had to do some digging to find a model that used the same convection fan AP6327842 and actually gave a resistance value. Looks like it should be around 411Ω, though it doesn’t specify which winding that should be on.
https://www.appliancepartspros.com/ge-fan-motor-convect-wb26x28953-ap6327842.html
Just to follow up, the fan spins freely and the motor seems to turn on (and shut off quickly)…is there any other thing that could be causing the fan to turn on for 4 seconds and then turn off (and repeat)…?
Nothing that hasn’t already been replaced.
Is there a thermostat on this unit, and if possible, where is it located?
There do not appear to be any thermostats on this unit.