Vokera boiler problem

need to change thermostat and a thermocouple

Sounds like the flue is damaged or blocked.check whole flue to see if it is intact and no blockage at end

Your talking about running pipes outside to this building ?

I had the same problem. There's another clear rubber pipe underneath, that runs from the front right to a pump in the middle. I had to pull it off and dry it with a hairdryer before mine would light properly. Blast into the hole the pipe came off too to dry the sensor if there is one.

Vokera minute problem,
Replace the venturi at flue outlet

refere to manual sounds like overheat stat call expert

your fan may need attension fan runs after boiler shuts down is normal on some Vokera,s too clear fumes out the flue 2mins approx

Has the boiler cool down? Try turn the power off for a few minutes and see if that will work.

Vokera will send in post if requested

sounds like you have an earth leak or defective pump winding