Hotpoint HCM 15 stuck on rinsing?

Hi, my Hotpoint HCM is not working. We cleaned it in December and now it continually rinses.It just says "Machine is rinsing- press water button"
When I press the button, water simply comes from the steam spout thingy and just carries on until the tank is empty.
It doesn't seem to be warming up either. Could the thermostat be faulty?
Thanks for your help.