My asko dishwasher will not
Welcome to FixYa.
As an Asko expert and based on your post, the good news...I can fairly confidently tell you It is likely nothing very serious, but the "resolve" requires some investigation on your part.
What the pump running continuous means is the timer has indicated a overfill.
**before proceeding turn the dishwasher power off via the home breaker panel, or unplug it from the wall if that is possible...most are hard wired to the home electrical...safety first**
The first thing to do is remove the toe panel/kick plate and inspect the base for water. There will likely be water present.
With the aid of a sponge, towels, or a wet-dry shop vacuum, absorb the water from the base, that should restore normal operation...it should be known that if you leave the unit for a few days, the water in the base will evaporate hence appearing as everything is fine again...if any other problem/leak does exist it will return.
If the unit works fine after resetting the power/breaker and soaking up any water present, it can likely be chalked up to a drain back-up or obstruction in the drain hose or pump... (it could mean a faulty drain pump so you'll need to pay close attention the next few times you run it)
**The float is primarily the last ditch safety to prevent disaster in the event of a overflow, back-flow, or leak underneath the unit and the continuous pumping is letting you know to service or call for service to the unit**
Hope this helps move you forward, or even better resolves the issue altogether. Let me know of course, I will help you move further if necessary.