An Asko Dishwasher That Will Not Drain: Ten Minutes Before You Call

Standing water in the bottom of the machine at the end of a program. It is the most common dishwasher call we take, and on this make it is also the one where the free checks pay off most often.

Get the water out first

Sponge or scoop the standing water out before anything else. It makes the filter reachable, it stops a quart of gray water coming out with the stack, and it prevents the smell that follows a day of standing water in a warm kitchen.

Lift the whole filter stack

Pull the lower basket out. Set into the tub floor is a cylinder that unlocks with a quarter turn and comes away; under or alongside it sits a flat plate. Neither needs a tool.

This is the step people half-do. Rinsing the cylinder under a tap and putting it back leaves the plate underneath exactly as it was, and the plate is where the load actually sits. Take both out, rinse both, feel into the well underneath for glass, a cherry stone or a peeled-off label.

Now refit the stack and rotate it home until it seats. A stack seated a quarter-turn short causes its own leak later, and a good share of the leaks we are called to began with somebody clearing a filter correctly and reassembling it hastily.

Check whether the machine is even to blame

Run the kitchen tap and watch the sink. If the sink drains slowly, the dishwasher is innocent and the problem is in the waste it shares. Two specific things account for most of that:

• An air gap at the sink that has silted up.
• A knockout plug in the disposer, left in place at installation. Machines fitted that way have never drained properly and nobody connected the two.

Then look behind the machine as far as you can see, for a drain hose crushed when the appliance was last pushed back.

What the code tells you, and what it does not

On the current display machines, F11 means the water did not get out and F68 means the control has read a problem in the drain pump itself. On the legacy DW20.1 boards the same condition is a blink pattern rather than a number. On the Outdoor door it is F:45, which on an indoor machine would be the diverter — a different part entirely.

So the code narrows things once you know which machine you have, and misleads if you do not.

When it is ours

Filter clear, sink draining, hose straight, and the water still standing. Now the pump, or the route inside the machine, is what remains — and it gets a meter on it rather than a replacement on a hunch, because an impeller fighting a jam sounds exactly like a pump that has died.