Hot water on constantly vaillant ecotech 30 combi boiler

[Nuts&Bolts]

I notice last night my boiler cupboard was really hot from the hot water pipe, but my husband had just had a shower. This morning it was still hot when we first got up and we noticed the tap symbol was flashing. This is supposed to flash when using the hot water. We've tried turning off comfort mode, turning it off and on again, reducing the water temp, but it still keeps flashing and the hot water pipe is constantly on.

The plumbing has only recently been done and we think it may be a leak. We have got in touch with the builder to see if they will come out to look. Is there anything else we can do to look into the problem/check the boiler?

 

[Deleted member 120897]

Can you post photos of the boiler and display? Have you got any dripping taps? Isolate the cold feed under the boiler and else if this stops the flashing and heating of the pipe. Is it just a combi, or do you have a hot water cylinder too?