We may have found other answers which could help you.
Click here for Fire Switch Workdimplex chesford?
Dimplex XT18 Series G?
How to change the lamp holders in my Dimplex Cheriton electric fire?
How can I fix my Dimplex XL5N storage heater?
Dimplex exbrury fire?
I too have a dimplex that has just started making a knocking noise!?