Heatline c24 warm water!

[Hobo128]

Any help with this rubbish boiler would be helpful.
Open hot tap and water is only warm. Display says 30c . Changed diverter cartridge but no good, check plate heat which seems fine.

 

[ShaunCorbs]

Does it fire when hot tap is opened ?

 

[Hobo128]

Does it fire when hot tap is opened ?

It does fire, it does not modulate down either

 

[ShaunCorbs]

Have you checked temp sensor ristance ?

 

[jtsplumbing]

Sounds like its not going onto full burn, PCB or Gas valve maybe ??

 

[townfanjon]

Hw thermistor maybe .
What temp diff have you going in and out of the plate