Material to prevent short circuit?

[beers.jo...@gmail.com]

Our GE electric oven periodically displays an F7 error code and beeps loudly. The fix that I've been repeating for many years is to jam pieces of a business card between the ribbon connector and the metal housing to stop the short circuit.

Here's a link to the fix:

https://applianceassistant.com/ServiceManuals/dreaded_f7_problem.pdf

Photo of the fix, using 2 pieces of business card:

The fix needs to be re-done a few times per year. Any suggestions for a material that would prevent the short circuit better than a business card, so I don't have to repeat the fix as often? Ideally something slightly thinner than a business card so I could jam it in 

The .pdf instructions say, "Don’t be concerned about using paper for the insulation. It will not get hot enough to burn." (In the back of the photo, you can see that GE placed paper instructions on top of the oven.) 

Here's a photo of the model and serial number, in case that helps.

Thanks!

Jonathan 608-516-7915

[Chris Meyer]

Kapton tape seems like an ideal solution, it's high temperature resistant, sticky, and you can stack layers to get any thickness you want.  The downside would.be that it's difficult to remove.

You could also pull that connector and solder wires between both boards to fix this permanently but it's lots more effort.

We have kapton at the shop if you want some, otherwise it's inexpensive.

Chris 

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[Davie]

Why is the business card trick failing?

If you have to have something to shove in there (I.e. you can't install kapton) I would try a thin piece of plastic from a notebook cover. This stuff can be cut into more shapes than business cards and forcibly stacked in there.
Davie
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[Bruce Mackenzie gm]

Cut a plastic piece from a 1 gallon 

Milk bottle.

Ours are HDPE high density polyethylene. 

But the melting point might be low.

 
... Bruce Mackenzie
     Mars Foundation
     781.249.5437

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[cha...@charlescollins.net]

On 2023-07-28 17:25, Davie wrote:

I would try release liner like he backing of a large bandaid or stickers if you have them. They are thin and better insolated than paper. Maybe try an old gift card. It is similar in size and plastic.

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[beers.jo...@gmail.com]

Thanks all. All of the plastics are a bit too thick, but next time it's beeping (which also makes the oven unuseable), I may try the Kapton tape, or sticker backing to see if they're rigid enough to insert. Or, grind a piece of plastic a bit so it will fit. The problem happens when the humidity is high. I think the hygroscopic paper business card becomes more electrically conductive when it soaks up water vapor from the air.

I appreciate the Sector 67 community.

Jon

[Jeff budrys]

I would try leaving the backing on some vinyl tape. That should give you some stiffness as well as insulation. The tape sold for imitation carbon fiber might work well. 

VViViD High Gloss Epoxy Black Carbon Fiber Vinyl Detailing Wrap Tape DIY Roll (4" x 20ft)… https://a.co/d/6by3yIe

Sent from my iPhone

On Jul 31, 2023, at 09:52, beers.jo...@gmail.com <beers.jo...@gmail.com> wrote:

Thanks all. All of the plastics are a bit too thick, but next time it's beeping (which also makes the oven unuseable), I may try the Kapton tape, or sticker backing to see if they're rigid enough to insert. Or, grind a piece of plastic a bit so it will fit. The problem happens when the humidity is high. I think the hygroscopic paper business card becomes more electrically conductive when it soaks up water vapor from the air.

To view this discussion on the web visit https://groups.google.com/d/msgid/sector67/9272e419-2ea5-473d-83d9-cdebebb89e3dn%40googlegroups.com.