I have a Schumacher model se-1010 6/12v 10a automotive battery charger with a blown thermal fuse. I managed to pull it out of the transformer and it looks like a common 10a type thermal fuse. Only problem is it is covered with shellac and I cannot read the temperature rating of it. The shellac will not come off without scraping it. Any suggestions as to what temperature it might be? The transformer and everything else is good and the charger works perfectly when the fuse is bypassed however I do not want to permanently bypass it and create a potential fire hazard.