hotpoint washing machine saying h20?

Nothing to do with water valves. This is a very common main module fault. We stock them ready-programmed at our site at www.emwelec.co.uk If you need help fitting it, go to youtube and put H20 and the model number of your machine in the search box

Tony
February 2016

H20 is the chemical expression for water.

A common failure on washing machines is a defective water inlet solenoid valve - it can stop working - the external water hose connects to it - they are inexpensive and easy to change.

Youtube very probably has videos

Good Luck...
February 2016