Why won't steam come out of my Vaporetto?

[TSSDNCOP]

It's got the right amount of water.

I've used it before with no issue.

I'm using it the same now.

No steam

Can you help?

something is clearly blocked. How long is it since it was used? if you are in a hard water area could the jets have become blocked? Did you empty it after the last use?

Limescale?

Yes hard water. Some water left in.

The hose is cold. Any blockage must be at the chamber end.

How to unblock?