How to mend Pressure Heating Vokera Linea

Vokera boiler on constantly. Room stat showing unknown code. ?

Vokera sorry ?

vokera 12-48rse?

Vokera excell boiler needs topping up every couple of days ?

heating system?

water drips from overflow?

how to ignite voker pilot light?

wiring a nest heat link to a vokera 25 he compact ?

Vokera mynute 28se?

no hot water/heating?

Faulty vokera compact 25?

Max pressure?

Max pressure?

I have a Vokera 24 that shows error code 07. can anyone help me fix it?

Vokera mynute 35e fault code 08 what is problem?

Error code E82?

my pressure on my boiler has gone?

vokera boiler no heat but 2nd pipe from the left is red hot?

vokera boiler not 2yrs old yet , wont work?

Vokera Maxin 28e combi boiler, DHW runs hot and cold?

How can I sort my thermostat. Code: 20059643?

Ignition failure on Vokera Vision C boiler?

I have a vokera 24m gas boiler ?

how can I fix my Vokera linea 24 Combi?

Max pressure?

Faulty vokera boiler compact 25?

rads warm up when hot water turned on vokera unica 36 he?

how can we fix our Vokera compact 29a lose presure ?

timer on my vokerera excell boiler does not go round, how do i fix it?

Boiler age?