Vaillant Ecotec Plus 835 - hot water issue.

31 Aug 2015
Reaction score
United Kingdom
Hi all,

I have a hot water problem with my new Vaillant Ecotec Plus 835. This boiler has just been recently installed, we've been using it for about 2 months and once in a while there is no hot water coming out of the taps, the central heating seems to be working fine, just no hot water on tap.

Whenever this happens, the hourglass icon is showing on the display. The boiler pressure is fine (1.5 bar) and pressing the fault button always rectifies the problem but it happens often, about every 2 days. Once it occured late at night, by the morning however, there was hot water without problem.

This shouldn't be happening right? I also have Comfort Mode set to 'on' could this be the reason no hot water comes through at set intervals?

Many thanks for your help guys!
Sponsored Links
If its only been installed 2 months ago the guarantee comes into play,
also Im sure the installer could take a look.

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Sponsored Links