its heat transference from the transformer in the panel could be a sign that the trannie is nearing its life span,take e manno advice get it checked out by a pro
gts
July 2013
It's not uncommon to see these marks on panels and also on the surface they have been mounted to.
For peace of mind I'd suggest getting a pro out to check it over and service the system as well.
Do this ASAP.......
e manno
July 2013
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