Vokera linea 24 Central heating coming on when it wants

[spannor]

Hi Guys ,
Trouble again with my linea 24,
The trouble is that my central heating is coming on when it wants or when D/H/w Is demanded . This happens even with the thermostat turned right down and also with the control valve set to just DHW. Does this mean that my main board is shot ?

Any help would be appreciated !

 

[Terrywookfit]

Sticking divertor valve spindle.

 

[spannor]

Hi,
Thanks for the reply .
i have recently fitted a new overhall kit in the diverter valve block but i will recheck it thanks matey.

would this make the rads get hot even when i don't use the DHW?

boiler seems to start up random and heats the rads as i say even with the control knob in dhw only mode.

just checking before i strip and buy parts.

 

[picasso]

The preheat for the hot water is trying to keep the boiler warm but as the diverter is passing is does not get up to temp, as said you need to sort out the diverter.

 

[spannor]

Ok thanks guys i will give it a go today.

thanks for the help ))