I could not change times on the analog clock, and when using pliers, the knob broke.

The replacement was a digital clock instead of analog. The directions were a little confusing, but adequate for the change. We removed the old clock, and followed the dirctions for replacing it. We made three tries to get the wires correctly connected and on the third try, it worked fine. However, I had to return the three knobs since the digital had push buttons. It fits into the space perfectly and we are very happy with it.