My immersion works, but the timer setting does not (if that makes sense). The immersion will fire when switch is on, timer, or off - but the actual timer does not work (when the timer is set to be 'off' the immersion will still turn on).
The attached picture shows the wiring as it was when I moved in and a wiring diagram from the instruction manual.
I just want to check whether there is a simple fix I can do to the wiring, or whether I need to buy a new unit/call an electrician in.