While you wait for answers, we may have found some information which could help you.
Click here for Radiator Not WarmHow can i fix my Dimplex Rio RMG 25 ?
Fixing Dimplex oil filled radiator?
Radiator does not get warm, why? (Dimplex)?
Dimplex ofc2009ti?
Dimplex RMG25 causes circuit breaker to pop?
DIMPLEX OFC2009TI OIL FILLED RADIATOR?