GE P7 Range Part Request/Question

[cadman]

Hey Guys,

I have a friend who just bought a GE P7 range and discovered the heating elements don't work. We tracked it down to the solid state control board(!) Who knew?

We know for sure there's a bad zener diode, but the reference number on the part is no help (not even in my old GE semicon books). They cheated and used a unijunction with a trimmed leg.

Is there anyone out there who's been through a P7-No heat situation before? Perhaps someone has a replacement control board they'd like to part with ($?). Lemme know!

Thanks!

 

[danemodsandy]

How Old Is This Range?

It would be interesting to know how old this P*7 unit is, because a vintage P*7 range is what I'm interested in having eventually. If older ones depend on a control board, that's valuable info.

 

[coldspot66]

Did you check the oven sensor at the rear wall of the oven for continuity? ...that will also cause no bake/broil. Do any of the oven elements work on clean? Just a thought!

 

[cadman]

I haven't seen it in person, but it's Avocado with keyboard burners. The components on the board are also of early 70's, late 60's design.

John, he was able to find the diagram for it and I had him track the fault down to the board. Another guy here at work threw the oscope on it and the SCR is OK. I smoked the "zener" when it went into conduction. Whoops. The unijunction is the prime suspect right now and that component crosses to something readily available. The zener is the big question. It's marked "3593GE" on ckt board WB24X151. We just found the board can be had for $200. Ouch. Total component costs can't possibly exceed 5 bucks.

 

[danemodsandy]

Oooh.

This is Not. Good. News. I had no idea there was a control board in GE's that early. I've been hoping to avoid electronics in my next range, because of the problems I've had with some in the past. Maybe I should concentrate on a GE Stratoliner from the late 50s, with no self-cleaning. That hoits, but I hate electronics on majors with a pluperfect purple passion. Today's power companies don't care enough about their infrastructure to deliver electricity as reliably as before, so the outages and surges that can kill electronics are just a fact of life.

 

[coldspot66]

New part# for control board is WB24X162. My cost is $157.00 if that helps and you have no other alternative. It's amazing that it's still available!

 

[tomturbomatic]

GE used many different control systems for their self-cleaning ovens. Make sure you have the exact model number and serial number before looking for the part. If you are fortunate enough to be able to repair the board, that is great. If push come to shove and you can do without the self cleaning feature, you can replace the thermostat with a non-self cleaning one.

 

[whirlcool]

But those GE P7 self cleaning cycles are just awesome. It will clean anything off the interior!