How to mend Vokera Shower Diaphragm

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

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

Vokera excell boiler needs topping up every couple of days ?

Boiler age?

my pressure on my boiler has gone?

Faulty vokera boiler compact 25?

Ignition failure on Vokera Vision C boiler?

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

vokera boiler not 2yrs old yet , wont work?

Vokera sorry ?

Vokera mynute 28se?

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

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

Vokera mynute 35e fault code 08 what is problem?

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

how can I fix my Vokera linea 24 Combi?

Error code E82?

How can I sort my thermostat. Code: 20059643?

I have a vokera 24m gas boiler ?

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

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

heating system?

water drips from overflow?

Faulty vokera compact 25?

no hot water/heating?

how to ignite voker pilot light?

Max pressure?

Max pressure?

vokera 12-48rse?

Max pressure?