isar 24 hot water problems

[jthorne82]

hi all,i have a isar 24 combi, right my problem is i have a 10 second burst of hot water out of my taps and my shower is luke warm all the time, the pressure is fine, central heating works, have re pressured it aswell, no error codes or loud noises. please help
james

 

[jthorne82]

and the water smells

 

[stevetheplumber]

if the water smells its usually the filling loop allowing water from the heating to enter the main take the hose of the loop and see whay happens then
ive only come across this problem once before and it was in the early days of combis when most had 2 stop cocks to fill them
low preasure on the main ment the boiler didnt over fill but when hot was run heating water was drawn in to the hot
seems unlikley now most boilers have check valves built into the loop but worth checking
only other place the waters could mix would be the plate heat exchanger but usually this would overfill the heating and lift the prv
poor hot water is probablt the three way stuck or the plate heat exchanger blocked

 

[jthorne82]

do you mean take the filling loop off

 

[jthorne82]

took it off but still no hot water, please help any ideas would be great did think diverter vavle but how could you check.

 

[jthorne82]

how do you go about checking if it is the heat exchanger where would i find it/clean it

 

[villa_tom]

The heat exchanger is inside the boiler and you would not legally be allowed to touch this. You'll have to get a GSE in to rectify problem, but with the boiler you have it could be anything.

 

[jthorne82]

does any one know if i can clean the catridge and were to find it have not got a clue

 

[jthorne82]

just found out that if just turn the hot tap a little on i have hot water all the time, but how comes it goes luke warm if i turn it on more?