GE wall oven F97

[ameritech]

JT3500SF3SS double wall oven. Per customer they were trying to broil and unit went out and gives F97. I verified and per tech sheet its related to the lower cooling fan. However  all I find online says it could one or both cooling fans, sensor board on the fans, main board or all above. For those who are familiar with this unit there are two "FAD'" boards--one for each fan-- which Im almost certain are the sensor boards (they have to be). I checked for pulsing 5v DC from the FAD supply connector @ main board per tech sheet and it was only 1.5v. Bad board? 

Ive heard this can be a tricky issue with multiple causes. I even found a class action lawsuit in my searches lol.

 

Thanks!

Jared

[16345Ed]

E97 is lower fan error 

 

Sounds like bad FAD if you checked proper pins. 

[ameritech]

The FAD is the sensor on the fan correct? I measured voltage at the Main board connector with blue and purple leads (each lead to ground). So you dont think it would be main board since it wasn't putting out proper voltage?

[16345Ed]

I believe you want to look for 5V at FAD(fan) itself. Check pins 1 to 2 and pin 2 and 3 only need to see it on one or the other of those sets of pins. 
 

the fan sends signal to board telling it how fast it’s running that’s what your looking for  

Also look for physical damage to fan. 

[ameritech]

Thanks Ed that makes sense. I appreciate your help.