Kitchen tap not working

Hi,
I’m new to motor homes and I’m just testing the systems out on my Nuevo auto sleeper but the problem I’m having is I can’t get water out my sink tap, shower and vanity sink work fine. I’ve followed instructions to prime the system but when I operate the tap the pump sounds for about 1 second then knocks off and repeats this every so often.
Does anybody have any ideas what’s wrong.

Cheers
Mick

hot/cold or both?

Hot and cold both work in shower and sink neither work on the main sink. I’ve looked for a micro switch but can’t see one when I take the tap off. It’s 2006 so not sure if it’s got one

No microswitch. It is either the cartridge in the body of the tap or the filter on the outlet. I posted some pics on the forum a few years ago - I'll see if I can find them.

Ok thanks Peter, I’ll try swapping the cartridge over with the bathroom one to rule that out.

Try this as well:

Well done Peter take the rest of the day off, it was indeed limescale blocking the filter.