My Blues Deluxe is broken, but I think it sounds better-WHY?

[maccampbells]

I may have asked this question in the wrong forum section so I'll try it again here.

So my circa '95 USA Blues Deluxe is broken. The "drive" channel light is on all the time and the footswitch does nothing, other that the light will come on (on the footswitch) when you click the footswitch.

I still have sound and both of the channels volume knobs have an effect, as well as the "drive" knob. I was a little worried at first, but now I think I like it.

It sounds good to me, but what do you think is going on here? How much to fix? Should I even bother until it actually stops working all together? AM I damaging it by continuing to use it?