Daniel Soroczyn
There are numerous faults that can effect taps depending on the types of taps installed. Assuming their traditional taps, its sounds that the jumper may have come off the spindle, this can be to them being over tightened or genual fatigue over the years. You can buy tap reviver kits which replace the mechanism inside but to be honest a new pair of taps can be picked up for not much more if you are not looking for anything fancy.
