E01 on a Viking dishwasher means the machine believes there is water where there should not be, and it is protecting itself. The giveaway is not that it stops — it is that it keeps pumping.
E01 appears on 8 jobs in our dishwasher records, from 2021 to 2025, mostly Viking with a Bosch and a Blomberg among them.
How customers describe it:
"When power on, it keeps draining, and then throws an E01 error. It has happened several times in the past year."
"Continuous cycling of the drain. Tried flushing and cleaning the filter, and unplugging."
"Not starting, with error code E01."
Why it drains instead of stopping
Most dishwasher leak codes just lock the machine out. This family does something different, and it confuses people: it runs the drain pump continuously.
The logic is sound. If the float in the base has lifted, the machine's job is to get rid of whatever is down there before it reaches the floor. So it pumps — and keeps pumping, because the float does not drop.
Which means the "symptom" people describe is the machine working correctly. The sound of endless draining is leak protection, not a broken pump.
It also means you should not just keep power-cycling it to make it stop. If there really is water in the base, you want it pumped out.
What actually fixed it on our jobs
Two of our eight E01 jobs needed no parts at all.
- One tech's note is three words: "Drain line cleaning."
- Another: "Leak, eliminated, drain cleaned."
That is the most practical thing on this page. A dishwasher that cannot push water out will eventually have water back up where the sensor can find it. The float lifts, E01 appears, and the cause is a blocked drain line rather than a failed seal anywhere inside the machine.
It fits the customer quotes too. "It keeps draining" and "continuous cycling of the drain" are both consistent with a pump that is running and achieving nothing because the path out is choked.
So the drain line, the air gap and the disposal connection are where a competent tech will start — and on our jobs, where two of them finished.
When it is a real leak
One job was not so simple. That record notes water underneath the machine, and it came back on a callback with the same code still showing.
So: E01 can be exactly what it says. A worn door gasket, a tired pump seal, a cracked spray arm fitting or a loose hose clamp will all put water in the base, and the machine will go on reporting it until the leak is found.
The difference you can often hear. If the drain line is blocked, the sink or disposal nearby will usually be slow too, and the machine's sump will have standing water in it. If the leak is internal, the tub drains normally and the water appears underneath regardless.
What you can safely check
- Switch it off at the breaker — not just the front panel — so the drain pump stops and you can work.
- Check the sink and the disposal. Run the disposal, then fill the sink and let it out. If that is slow, you have found your problem and it is plumbing.
- If the dishwasher drains into a newly installed disposal, make sure the knockout plug inside the disposal's dishwasher inlet was removed. A missed plug is a complete block, and it is a classic.
- Clear the filter and the sump in the floor of the tub, and scoop out any standing water.
- Check the air gap on the worktop, if you have one — the little chrome cylinder beside the tap. Unscrew the cover and clear it.
- Look underneath with a torch after all that. Dry is good news.
- Restore power. If the continuous draining stops and a short cycle completes, the blockage was the whole fault.
Call a tech when the draining continues after the drain path is clear, when there is water underneath the machine with a clear drain, or when E01 returns after a cleaning.
A note on Viking
Viking is a small part of our dishwasher work, so this page rests on eight jobs rather than hundreds — and we would rather say that than pretend otherwise. What it does rest on is the actual outcome of every one of those visits.
Viking dishwashers of this generation are built on platforms shared with other European makers, which is why a Bosch and a Blomberg in our records show the same code with the same behaviour. The Blomberg customer's description — "continuous cycling of the drain" — is word-for-word the Viking pattern.
Book Viking dishwasher repair
We repair Viking dishwashers across the SF Bay Area and Peninsula.
Call (888) 993-5699 or book online.
Related pages
- Dishwasher Not Draining, Standing Water — the blocked drain path behind most E01s
- Samsung Dishwasher LC Error — the same leak logic on a different brand
- Bosch Dishwasher E15 Error — Bosch's version of flood protection
- Dishwasher Repair in the SF Bay Area & Peninsula — our full dishwasher service
- Viking Appliance Repair — every Viking appliance we service
Frequently asked questions
What does E01 mean on a Viking dishwasher? E01 is a leak or overflow fault. A float in the base of the machine has lifted, and the dishwasher responds by running its drain pump to clear whatever is down there and refusing to start a cycle.
Why does my Viking dishwasher keep draining and won't stop? That is the leak protection doing its job. The float has lifted and the machine runs the pump continuously to get rid of the water. It is not a broken pump. Switch the machine off at the breaker if you need it to stop so you can look for the cause.
Can I fix an E01 error myself? Sometimes, because the cause is often the drain path rather than the dishwasher. Two of our eight E01 jobs were fixed by clearing the drain line. Check the sink and disposal drain freely, that a newly fitted disposal had its knockout plug removed, and clear the filter, sump and air gap.
Is E01 always a real leak? No. More often in our records it was a blocked drain path that let water back up to where the float could find it. But one of our jobs did have genuine water underneath and came back on a callback, so a real leak has to stay on the list.
How do I tell a blocked drain from a real leak? A blocked drain usually comes with a slow sink or disposal nearby and standing water in the sump. A real internal leak lets the tub drain normally and still puts water underneath the machine. A torch under the kick panel after the drain path is clear answers it.
Do other brands use the E01 code the same way? The ones in our records do. A Bosch and a Blomberg dishwasher both showed E01 with the same continuous-draining behaviour, and the Blomberg customer described it in almost exactly the same words as the Viking owners.