Boiler question: Timed Programmer

[jezzerr]

I had a new boiler fitted last week with a new timed programmer,Its one of those silly timer ones that has tabs i never have the heating timed only the water,So on the control box i have the button pressed in for water timed.

Now what would happen if i never pushed those silly tabs down would the water be on constant? yes thats right i never pushed the tabs right down.

This is the timer i have Switchmaster 805 - H&V Controls

If you click on the picture its the bottom right box.