The odds step up coil is probably the MOST replaced coil. I know the # by heart having replaced so many of them, b25-925a. Too often key people would accidentally bend closed the E.O.S. switch (end of stroke) by banging it against the wood when putting back top unit. It is that perpendicular switch all by itself just above the step up coil. If it does not open then the coil will not turn itself off, and after a few minutes smoke comes out of the top unit and everyone runs out screaming. Great fun in a crowded casino...!
As posted above, check your coils with 2 jumper wires to verify it is bad.