E01 on a Bertazzoni dishwasher almost always points to a fill problem: the machine asked for water, but the inlet valve didn’t open (or opened but couldn’t deliver water). That can be as simple as a closed shut-off under the sink, a kinked hose, a clogged little screen on the valve, or the valve itself failing.
Quick signs you’re seeing the same issue
- You start a cycle and hear the pump briefly, then the machine stops and throws E01.
- There’s no fresh water entering the tub.
- Sometimes you’ll also notice the hose under the sink is kinked or the tap is off.
Step-by-step to clear E01 (simple checks first)
- Confirm water is available. Turn on the cold tap at the same sink; if pressure looks weak or the building supply is off, fix that first. Then make sure the dishwasher’s shut-off valve is fully open.
- Look for a kinked or pinched hose. Slide the dishwasher out just enough to see the inlet hose. If it’s sharply bent behind the cabinet or crushed by the machine’s feet, straighten it and re-seat the unit carefully.
- Clean the inlet screen. At the point where the hose connects to the dishwasher’s valve there’s usually a tiny mesh filter. Power the unit off/unplug, close the shut-off, remove the hose, and gently rinse that screen. Grit or scale here can starve the valve and trigger E01.
- Power reset. With water confirmed and the screen clean, unplug for 30 seconds (or flip the breaker), plug back in, and start a normal cycle. A clean fill should clear the code.
If E01 returns after those basics, the valve may be sticking or electrically open-circuit, or a safety device is telling the control not to fill (for example, the float is stuck in the “full” position, or there’s water in the base pan on models with leak protection). At that point, it’s smart to call a technician.
When to call a pro (and what they’ll likely do)
- The code comes back even with good pressure, an open tap, a straight hose, and a clean screen.
- You hear the valve hum but no water enters, or you measure voltage at the valve during fill but it doesn’t open.
- There’s evidence of a drip into the base (some models will block filling if the anti-flood float is raised).
A tech will check line pressure, test the inlet valve coil for correct resistance, verify the float/level switch moves freely, and confirm the control board is actually sending power to the valve. If the valve is faulty, replacement is straightforward.
Preventing E01 next time
Keep the shut-off fully open, don’t push the dishwasher so far back that it collapses the hose, and give that inlet screen a quick clean whenever you notice slow filling. In areas with hard water, a scale filter on the supply line helps keep the screen and valve from clogging.
Fast fixes to try before booking service
- Restart the cycle after opening the shut-off or unkinking the hose.
- Hard reset: unplug for 30 seconds and try a short cycle to confirm fill.
If you’ve run through these and E01 sticks around, you’re past the DIY zone—get a qualified technician to swap the valve and double-check the safety sensors.
