Coffee Appreciation

My Gaggia has stopped working. The pump sounds, but no water comes out. Either the pump is knackered or limescale (London is a hardwater area) has got the better of it.

Anyone had this problem? If so... how did you solve it?

I could probably swap the pump if I knew it was that... or limescale remover, but I guess coffee machines require something specific so that it's non-toxic and has some very specific way of rinsing it out afterwards.

I always used softened water in my machine. did you fix it?