Where’s my NEFF thermostat reset button?

Our dishwasher is not heating the water – I think this stems from when my daughter used Fairy liquid instead of dishwasher powder

I understand that hopefully somewhere there is a thermostat reset button I could push to remedy this issue – unfortunately I can’t find this. It’s a NEFF S4453N0GB/13. Any pointers?

It’s built in – I can drag it our from under the worktop if necessary. (Amazingly, even though washing with cold water, it still cleans very well, though I think I’d prefer the germ-killng properties of hot water).

Help appreciated. I’d like to thank contributors to these forums in advance – I fixed a heating problem with our tumble drier in 2 minutes thanks to people here.