Green Coating on Ends of Sparker Probes Over Burner ?

To finish the story----

The green stuff did not come off with vinegar (6% acidic) perhaps because I could not soak the electrodes in place, don't know. Had to scrape them and got most of it off. Everything is back to working for now.

The two electrodes are there forever, rusted on to the hanging bracket also rusted on there, with their own little brackets, so even if the screws were drilled out, they will stay stuck. The sensor electrode is corroded, so I will have to figure out how to replace that someday, but not soon I hope.

EDIT just got a Norcold 641.3 off a guy, so that will be the new fridge. I am tired of keeping this OEM one going.

Maybe get some penetrating oil on the screw heads, just in case?
A small, brass bristled, brush with a baking soda paste might clean that up.

Here is a photo or two. The two electrode screws are rusted in, so probably can't get them out except by drilling if absolutely have to.

It is pouring buckets out there now, so project is delayed!



Showing the tip above the burner. The other electrode is the same.

I'd start out light with some baking soda and water. I would avoid using acids if possible, although most of the diy websites suggest some sort of acid/base/salt combinations, which I find puzzling.

When I told you to replace the igniter I didn't realize that it was a paleolithic fridge...heh. You might have a problem finding parts so I would be careful with what I did to it.

I do see that some parts are available tho and this troubleshooting manual: pdf

I'd try something like Brasso to clean it tho, less likely to do damage than a strong acid.

I think anything I do with vinegar or whatever will just get burnt off.

If it is that green oxide that link says it takes a long time to form (without any ammonia). To get the fridge working I just scrape the two probes a bit with a screwdriver, but most of the ends stay coated. A good clean would mean I shouldn't need to scrape them for a good while I hope.

My plan is to take them out, clean them up, and put them back in. I will use acid first to see what effect that has. I will try for before and after photos.

I expect to have the fridge working right by next year.

Vinegar in a spray bottle? Then a few minutes later some quick drying contract cleaner ?

Salt air, and many other compounds in the air, can accelerate its formation also. Are you parking near something putting out an exhaust of some kind? Mild acid may do the trick - try vinegar.

Old-Biscuit wrote:
What MOdel is your fridge??

Servel S630 (Dometic) in the 1991 MH.

Parts are 2943332.003 Sensor electrode, and
2943331.005 Igniter electrode

What MOdel is your fridge??