Taps do not ignite the boiler

[Richard Kenworthy]

Hi. I have a Vaillant boiler. In one sense - the central heating - it work absolutely fine: turn it on and the radiators get hot very quickly. The issue I have is that when you run the hot tap not only does no hot water get drawn from the boiler, but the boiler isn't activated by the tap turning on either. Once upon a time you would run the tap and the boiler would spark up on demand and give you hot water, no it just sits there.

I have decent enough water pressure. There are no faults reported on the boiler.

HELP!

thanks
Kenny

 

[Hot&Cold]

which Vaillant boiler do you have

 

[ianmcd]

we need to know which model of boiler you have post a pic is best