Hello Claudia,
You can use any make of foot control on your machine it does not have to be a Singer, the most common replacement foot control is a YDK. however, you said your foot control caught fire and I think that the suppressor has burn out out, you can take the suppressor out and discard it, you do not need it, it is unlikey the control itself has burnt out, if you want to have a look at that first before buying a new control all you have to do is peel back the rubber bottom and you will see a screw, undo the screw all the way, the screw won't come cpmpletely but will undo so the foot control opens up, look at the big thing that looks like a big fuse, take it out and scew it back up and I bet it works, what might happen when you undo the screw is the plastic around the screw might break away, this is not a major problem because you can glue that bit back in, try this first, if you really want a foot control let me know what country you are in and I will help you.
Ken
drivewithken@blueyonder.co.uk
drivewithken@blueyonder.co.uk, December 2007