While you wait for answers, we may have found some information which could help you.
Click here for Filled Towel RailFix my oil filled heater?
How can I mend my Hyundai oil filled radiator?
Oil filled radiator won’t stop clicking?
Efficiency of my oil heater?
What size spanner to free rad bleed valve?
Where can I get a manual for my ritetemp oil heater ?