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What E01 tells you and what it does not
Bertazzoni has not published one universal definition for E01 across its dishwasher generations. On one control it may point at a different assembly than on another, so this page will not hand you a made-up fault name. What it can do is help you describe the event well enough that a technician starts in the right place.
A code that shows up around an install
A lot of E01 calls come from kitchens where the dishwasher is only days or weeks old, or where cabinets, plumbing or countertops were just redone. In those homes the first suspects are not worn parts. They are things that changed around the machine: a supply line that was moved, a drain hose routed differently, a plug that was pushed in behind the cabinet and nudged since.
That is why the timing question matters. Write down whether E01 appears when you press Start, a few minutes into filling, or only on the second or third cycle. A code at the very start leans toward supply and control. A code that waits until the tub has water in it leans toward level sensing. Level sensing is how the control knows how much water is in the tub, so it cannot start washing until that reading matches what it expects.
Outside checks worth doing
- Look under the sink and confirm the water supply valve to the dishwasher is fully open, since valves are sometimes left half-closed after plumbing work.
- Check that the drain hose is not pinched where it passes through the cabinet side or behind the machine.
- Close the door firmly and watch whether the latch catches the first time.
- Photograph the display before you cancel anything.
If the code clears and the next full cycle finishes normally, keep an eye on it for a few days. A one-time E01 right after startup, with nothing repeating, is common enough that it is not automatically a repair. A code that does not return tells a different story from one that repeats at the same stage.
What a technician checks first
For a code that appears early in a cycle on a recently installed unit, the order is usually the water inlet path, the level sensing, and the connection between the control and those parts. After that the visit moves to the door latch signal and the control board itself. The door latch signal comes from the switch that tells the control the door is shut and locked, so a latch that catches only sometimes can mimic a fault elsewhere. Nothing is replaced on a guess; each step is a measurement against what that exact model should show.
When to stop troubleshooting
Water on the floor, a breaker that trips, or E01 coming back on every cycle all move this from a watch-and-see item to a diagnostic visit. Mention the install or remodel date when you book. It helps rule out installation causes quickly. See the Bertazzoni Dishwasher Repair page for how a visit works.
Frequently asked questions
Not necessarily. It can be, but a first-cycle code on a new machine can also be a transient startup condition. The way to tell is whether it repeats, and at which stage.
Yes, some codes are logged once and not repeated. If it stays gone through several normal cycles, it is worth mentioning later but rarely urgent.
If the code showed up within days of the install and you see a kinked hose or a closed valve, the installer is a fair first call. If those look right, a diagnostic visit is the next step.
Model compatibility: Bertazzoni reuses codes across series and model years, so E01 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
