Bosch E23 means water has been detected in the base tray under the machine. The AquaStop system has cut the water fill to stop a flood. It is a leak warning, not a drain fault, and the machine should stay off.
Stop now — do this first
Switch the machine off at the plug and turn the water tap off. Do not restart it to see if the code clears. Every restart with a live leak puts more water into the base, onto the floor and, in a flat, potentially through the ceiling below. Pull the machine out only if you can do it safely and without straining the hoses. Put a towel down to catch what is already there. This is the same first step we give for any leak — see our washing machine leaking page.
Safe checks — external only
- Look for water. Check under and behind the machine, and along the wall behind it. Where the water sits often tells you which side the leak is on.
- Feel the hoses. With the power off, run your hand along the inlet hose and the drain hose. A split, a perished section or a wet joint will show itself.
- Check the door seal fold. Open the door and look inside the fold of the grey seal. Coins, hair grips and grit sit there, and a tear in the fold leaks on every fill.
- Check the detergent drawer. A drawer front running with water during fill can point to a blocked drawer or hose.
Do not tip the machine to drain the base as a fix. Tipping does empty water off the float switch, so the code clears and the machine runs again — for one wash. It clears the switch, not the leak. The base fills again, and next time the water may find the electrics or the floor first. We see this regularly: a machine tipped twice, then a bigger bill.
What usually causes E23
- A split inlet hose or drain hose, often at a bend or where it rubs.
- A torn or perished door seal.
- A pump seal weeping under pressure during drain.
- A heating element furred and split by limescale. This is a hard-water problem: homes normally supplied by Bog of the Ring, around 336 mg/L and very hard, and Leixlip, around 200 mg/L, fur elements far faster than softer areas such as Ballymore Eustace at around 50 mg/L.
- A hose clip worked loose, sometimes after the machine was moved.
What it is not
E23 names a fault family — water where it should not be — not a guaranteed part. The code cannot tell you which hose, seal or component has failed, and Bosch models vary in how the base, float and AquaStop hose are arranged. Replacing parts on a guess wastes money. The leak has to be found, not assumed.
Flats and rented homes — act faster
In a house, a slow leak usually shows as a damp patch or a warped board. In a Dublin flat, the first sign can be the neighbour below knocking about a stain on their ceiling, and the bill grows from there. If your machine sits over another home, treat any E23 as urgent: power off, tap off, towels down, and do not run another cycle “to finish the load”. For tenants, tell the landlord or agent the same day and keep the photo of the code — under Irish rented housing standards the landlord is responsible for keeping a supplied machine in working order, unless the damage was misuse. If we attend, we can put the cause in writing for the agent, which settles most arguments about who pays. We cover the wider checks on the leaking fault page, including what to check at the waste pipe and standpipe, because not every wet floor under a Bosch is the machine itself — a blocked standpipe can push drain water back out and mimic a machine leak. That is another reason we trace the water under observation rather than changing a seal on sight.
The priced fix
At the machine we dry the base, run a controlled fill and drain under observation, and trace the leak to its source before quoting. You get a fixed written price before work. Hoses and seals are usually €149–€229 all-in, and a heating element is €179–€249. The €79 call-out is credited in full against the repair, there is no second call-out charge, and the work carries a 1-year workmanship warranty. If the machine is not worth fixing, you pay only €79 and get the verdict in writing. See Bosch repairs in Dublin and the full cost guide. Prices checked November 2026. Ring 645 465-6305 or book a repair.
