Eberspacher fault

[Celticrsmith]

Hello. Anyone know if this is a common fault? Is it easy to fix or could it be suggesting something more sinister….?

H1 Fuel supply or Pump

 

[HotandCold]

Hello. Anyone know if this is a common fault? Is it easy to fix or could it be suggesting something more sinister….?
View attachment 179034
H1 Fuel supply or Pump

it could be a fuel supply issue, has the heater been working ok? I would suggest using the controller diagnostics to clear the fault code and see how the heater runs