While you wait for answers, we may have found some information which could help you.
Click here for Service Boiler Startvonhaur Dragan 2500w oil electric heater no power?
Oil filled radiator won’t stop clicking?
Efficiency of my oil heater?
What size spanner to free rad bleed valve?
Sorry the make is dimplex model FC2009Ti?
Glen Dimplex Oil Filled Heater OFC2000 2KW?