CH but no HW from taps

[muckle_moose]

Hello,

I have a Valliant 242 combi boiler.

The CH is working, pressure 1.5 bar.

The HW is not working when the taps are turned on.

The boiler has been turned off and on again. No change.
No recent changes.

Any suggestions about the possible cause of the fault?

Help much appreciated!

 

[ChrisR]

Usually a diverter valve or diaphragm problem.
Answer does depend which Vaillant 242 it is.
Two square guageson the panel, or is the panel black with lurid green knobs?

 

[Agile]

Usually a diverter valve or diaphragm problem.
Answer does depend which Vaillant 242 it is.
Two square guageson the panel, or is the panel black with lurid green knobs?

But there is also an 824 with green knobs which caught me out once!

Tony

 

[ChrisR]

But that has a grey panel and isn't a 242........