I have a Linea, but can't establish what model. Mine has a mode selector switch between Hotwater only, off/reset and heating and hot water. If this is set to hotwater only, switch it over. If on heating/hot water, the valve may have become blocked with lime scale. Had to replace mine for this reason. Done by plumber under a service agreement, so no costs given.
Hope this helps.
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.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local