Been getting this light-green coating on the probes in the fridge. The probes are sort of brass except for about an inch or so at the ends over the burner where they are lightly coated (no lumps).No spark unless I scrape the ends some, then good spark. What is that stuff? It seems to develop when the fridge has not been used for a few weeks. Once I get it going the fridge cycles ok after that.Thanks.

Hopefully it isn't from a tiny ammonia leak which can turn brass green

agesilaus wrote:Hopefully it isn't from a tiny ammonia leak which can turn brass greenIt is only over the ends where they are in the flames. Flames are proper colour. Is it something in the propane maybe?

Copper sulfide ? How close is the proximity of the fridge to the batteries

MrWizard wrote:Copper sulfide ? How close is the proximity of the fridge to the batteriesMiles away, but it does maybe go with how copper roofs on buildings go green. Perhaps the part in the flames is more vulnerable to that?

Green Coating on Ends of Sparker Probes Over Burner ?

20 Replies

agesilaus
Explorer III
Dec 30, 2019
I'd think about replacing the probes if I were you. I've never heard of anyone else reporting this so it seems to be unusual. If possible I'd call the manufacturer tech support to see what they say.
BFL13
Explorer II
Dec 30, 2019
If it is that oxide, then it says acid gets it off. If that is what it is, I need a spray can of whatever that will do that.

It is hard to get at with a file or anything, and a PITA to pull that assembly out to get at the probes with sandpaper.
agesilaus
Explorer III
Dec 30, 2019
Yeah maybe just the tips are brass or being heated may have something to do with the formation of whatever it is.
BFL13
Explorer II
Dec 30, 2019
That link does say the patina does not conduct electricity.

I don't know what the sparker probes are actually made of.

Good point about ammonia. That link says that is the quick way to get a patina formed.
MDKMDK
Explorer
Dec 30, 2019
https://makeitfrommetal.com/why-do-brass-bronze-and-copper-turn-green/
BFL13
Explorer II
Dec 30, 2019
MrWizard wrote:
Copper sulfide ?
How close is the proximity of the fridge to the batteries

Miles away, but it does maybe go with how copper roofs on buildings go green. Perhaps the part in the flames is more vulnerable to that?
MrWizard
Moderator
Dec 30, 2019
Copper sulfide ?
How close is the proximity of the fridge to the batteries
Lwiddis
Nomad
Dec 30, 2019
Yes, ammonia is bad news.
BFL13
Explorer II
Dec 30, 2019
agesilaus wrote:
Hopefully it isn't from a tiny ammonia leak which can turn brass green

It is only over the ends where they are in the flames. Flames are proper colour. Is it something in the propane maybe?
agesilaus
Explorer III
Dec 30, 2019
Hopefully it isn't from a tiny ammonia leak which can turn brass green

Forum Discussion

Green Coating on Ends of Sparker Probes Over Burner ?

20 Replies

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