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Old 08-11-2013, 02:00 PM   #1
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Canned light and soot


Hi everyone! New to this site and already hooked and found a few really helpful posts. I did search for this issue, and was not able to find anything related.

In my kitchen there are a few canned/recessed lights. Recently one bulb burnt out and as a result there are soot marks around the edge of the can. I feared an electrical issue, and have pulled out the can, but everything is clean and no signs of a short. So unsure if this is just a product of the bulb burning out -- assume it would smoke some while burning out OR if this is something much different and would need a professional to inspect.

In checked other canned lights, I do see slight soot marks.

The breaker did not pop when the light burnt out, so guessing there is no short in the circuit. No other lights went out at the same time, and they are on the same breaker.

many thanks in advance!
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Old 08-11-2013, 02:23 PM   #2
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Canned light and soot


The soot looks like air infiltration from the attic.

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Old 08-11-2013, 02:27 PM   #3
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Canned light and soot


Get uo in the attic and air seal the can-----aluminum duct tape--caulk or some thing like that---
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Old 08-11-2013, 02:51 PM   #4
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Canned light and soot


Is it an IC (in contact) can?
Is it an Air Tight can?
Should say what it is right inside the can/
What's above that area?
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Old 08-11-2013, 04:08 PM   #5
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Canned light and soot


Not only is the can an ICAT, but his trim is an airtight as well.

Why they aren't sealing doesn't show in the photo's, but Oh'Mikes recommendation is a good place to start. I would also suggest that while in the attic try to compare it to a can that is not leaking. They usually have a foam seal over the themocouple and where the flex conduit enter the fixture. If one of those is missing on the problem can, I would seal that area as well.
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Old 08-11-2013, 05:31 PM   #6
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Canned light and soot


That is NOT soot, but DUST!!

Seal up the can(s) and your problem will disappear
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Old 08-11-2013, 07:17 PM   #7
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Canned light and soot


Many thanks all.

Sadly these are in the first floor and directly above is the second floor, so no easy method to see/inspect the cans to see about seals.

Likely the dust has always been there, just never getting any attention until the light burnt out.
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Old 08-11-2013, 08:31 PM   #8
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Canned light and soot


Caulk the seam between the can and the drywall---
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Old 08-17-2013, 09:09 AM   #9
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Canned light and soot


really simple fix... when you get the new light, apply a small bead of caulk around the top of the outer lip before you put the light in place. When the light is lifted to the ceiling, it will create an air tight seal with the drywall.

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