If your Vantage wall-hung boiler has E0 fault code, it may be caused by the following reasons:

1. The gas pipeline is blocked or blocked;

2. Gas sealing caused by furnace failure;

3. The air valve is damaged or improperly installed;

4. The flame monitor is faulty or blocked;

In case of E0 fault code, the gas valve should be closed first to ensure the smooth gas pipeline, and then check whether all parts in the furnace are normal and eliminate the gas shutdown caused by the fault. If it is necessary to replace furnace parts, it is recommended to contact professional technicians for replacement or maintenance to ensure safety and stability. At the same time, it should be noted that only qualified personnel with professional training are allowed to carry out maintenance, so don't cause potential safety hazards because you want to carry out maintenance yourself.