The footpedal in my 1209 PFAFF gets hot when I sew.
If your machine is turning easily the following applies.
This is a carbon pile foot control (Not Electronic) and when in use for an extended period of time(like doing embroidery,piecing quilts) the foot controller will get hot. There's nothing you can do about this except wear shoes.
If your machine is not turning freely, then if needs to be seen by a technician to find out why.