We may have found other answers which could help you.
Click here for Problem Water Pressure Low BoilerOil filled radiator won’t stop clicking?
Low pressure below 1, Lockout on. won't rest?
How can I mend my Hyundai oil filled radiator?
Glen Dimplex Oil Filled Heater OFC2000 2KW?
My electric oil heated radiator isn’t heating up properly. ?
What size spanner to free rad bleed valve?