While you wait for answers, we may have found some information which could help you.
Click here for Heater Stopped LightLow pressure below 1, Lockout on. won't rest?
How can I mend my Hyundai oil filled radiator?
vonhaur Dragan 2500w oil electric heater no power?
Efficiency of my oil heater?
Glen Dimplex Oil Filled Heater OFC2000 2KW?
Where can I get a manual for my ritetemp oil heater ?