While you wait for answers, we may have found some information which could help you.
Click here for Oil Going LockoutMy electric oil heated radiator isn’t heating up properly. ?
Glen Dimplex Oil Filled Heater OFC2000 2KW?
Efficiency of my oil heater?
Where can I get a manual for my ritetemp oil heater ?
Sorry the make is dimplex model FC2009Ti?
Low pressure below 1, Lockout on. won't rest?