Zanussi ZWH6160P Not heating Up

Humbly hoping that someone can offer me some guidance please. Our 2 year old Zanussi ZWH6160P started tripping the main RCD on the consumer panel twice each wash then it stopped tripping the RCD but I noticed that it was not heating the water. So I took out the heating element and tested the resistance, which looks fine at 34 ohms, I then took out the Heat Sensor which is one of those bullet ones inserted into the element and that had a resistance of 4800 ohms, I dipped it in hot water and the resistance went down, so I am assuming that is also OK. Really not sure what else it could be? I don't won't to start throwing new money after old it it is going to be something major as to be honest it is not that good a machine, we had a Zanussi previous to this machine which ran without any issues for 10 years and washed much more better.

Anyway any helpful tips would be really appreciated.

TIA