PoP wrote in message . ..

Make sure you disconnect from the electrical supply before you start
diving in (pun not intended).

The pump is a fairly common thing to go wrong. Your mission in
removing the back cover will be to locate the pump (shouldn't be hard,
it'll be at the bottom), then try spinning the rotor by hand if
possible.

Before removing anything, and before disconnecting the electricity, if
the machine has a rotary electro-mechanical control knob this should
be rotated while listening for the pump cutting in.

It also might help if the OP stated make and model.