While you wait for answers, we may have found some information which could help you.
Click here for Fault Heater DimplexHow to change LED driver on Dimplex fire?
Dimplex Cavendish Optimyst electric fire?
cannot turn off dimplex electric fire?
How to reset Dimplex storage heater CXL5N?
Faulty lights on Dimplex mk11?
Dimplex 403BT convector heater?