vaillant turbomaxplus824e hot water problem

[willow123]

hello
i had the usual problem of no hot water(ch ok)so just fitted new diverter valve however water still not hot enough for a bath any ideas or help would be appreciated.

 

[sepbon]

try isolating the flow valve under the boiler and see what happens when u turn the h/w on also check stop cock is fully on and flow rate of h/ water against the MI,s

 

[sepbon]

it also could be the plate h/exchange blocked with magnatight isolate c/h f&r valves cold water valve removw plate h/exch use a tool to bang against the plate you'll might find a load of particals inside worth trying