While you wait for answers, we may have found some information which could help you.
Click here for Faulty Lights WorksLooking for reset button on dimplex convector heater DX25F10?
How to reset Dimplex storage heater CXL5N?
Dimplex Cavendish Optimyst electric fire?
Dimplex duo heater?
cannot turn off dimplex electric fire?
Dimplex Optiflame X1S Series B stopped working?