Bertazzoni Dishwashers E4 Error: Anti-flood sensor triggered
What Does E4 Mean on a Bertazzoni Dishwasher? Error code E4 is an anti-flood alert. A float switch or sensor in the base drip tray has detected water where there should be none. Bertazzoni dishwashers — including the Professional Series DW24PR and DW24XT — include this flood-protection system as a safeguard against water damage. When […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Do not operate the dishwasher with E4 active. Water in the base tray indicates an active leak that could damage cabinetry, flooring, or sub-floor structure. Shut off the water supply and discontinue use until the leak source is inspected and repaired.
Can I reset the code?
No. The anti-flood switch resets only when the base tray is completely dry. Even after drying the tray, the underlying leak must be repaired — otherwise the fault will return within the first cycle.
When to stop immediately?
Stop if you notice: Water is visible on the floor under the toe-kick or cabinet base, The drain pump is running continuously and will not stop.
Symptoms You May Notice
Drain pump runs continuously with no active wash cycle
The flood-protection system activates the drain pump to attempt to remove water from the base tray. The pump runs non-stop even when no cycle is selected and the door is open.
Standing water visible under the front toe-kick
Water that has leaked into the base tray can seep out under the front toe-kick panel onto the floor. This is a visible sign of an internal leak that has reached the drip tray.
Machine refuses to start any new cycle
The anti-flood switch latches the control board into a lockout state. No wash program can begin until the tray is dry and the switch resets.
Possible Causes
Door gasket worn or deformed
The perimeter door gasket seals the tub during operation. If it has hardened, cracked, or deformed — common after several years of thermal cycling — water sprays from inside the tub during the wash phase and drips into the base.
DIY PossibleCracked sump or internal spray arm feed pipe
A hairline crack in the sump body or the internal pipe that feeds the spray arm tower can direct a steady stream of water into the base tray during every cycle. This typically requires sump disassembly to diagnose and repair.
Requires ProfessionalInlet valve leaking past the solenoid seat
A worn valve seat can allow a slow trickle of water into the tub even when the solenoid is de-energised. Over time this slowly overfills the sump and eventually floods the base tray.
Requires ProfessionalSafe Checks You Can Do
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1
Shut off the water supply immediately
Turn the hot-water supply valve under the sink clockwise to closed. This stops any additional water from entering the unit while you assess the situation.
Do not turn power back on or attempt to restart the dishwasher until you have identified the leak source.
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2
Inspect the door gasket visually
With the door open, run a finger along the full perimeter of the door gasket. Look for cracks, flattened sections, or areas where the gasket has pulled away from the channel. Pay particular attention to the lower corners where water stress is highest.
Press the gasket firmly back into its retaining channel if it has popped loose — this is sometimes the entire fix.
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3
Remove the toe-kick and check the base tray
Unclip or unscrew the lower toe-kick panel. Look into the base with a torch to confirm water in the tray. Note whether the water looks clean (supply leak) or soapy/dirty (tub leak during cycle).
The nature of the water — clean vs. soapy — narrows the cause significantly before a technician visits.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Door gasket appears intact but E4 returns after drying the base tray
- Water in the tray is clean, indicating a supply-side or inlet valve leak
- Sump or internal hose connection shows visible cracking or mineral staining at a joint
Need Professional Help?
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