Bosch dishwasher error codes

Find your code below, then run the free checks before buying anything. Each row says what the code means and how serious it is.

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Showing all 24 codes

The 24 Bosch dishwasher codes verified so far, whether or not each has its own page. Manufacturers document codes across several places, so a code missing here is one we have not confirmed yet — not one that does not exist. None has a page yet: each still needs confirmation from a second, independent source, so these rows state the meaning and nothing more.
Code	Also shows as	What it means	Category	Severity	Effort
E24	F24	E24 means the dishwasher is not draining properly because the drain filter is blocked. Water left pooling at the bottom of the tub, a cycle that pauses part-way, and gurgling or humming noises are the symptoms Bosch lists alongside it.	Not draining	Medium	Free check
E25	—	E25 means the dishwasher's drain pump is either blocked or its access cover is loose or missing.	Not draining	Medium	Free check
E22	F22	E22 means the dishwasher's filter is blocked, typically by trapped food particles.	Not draining	Medium	Free check
E15	—	Bosch dishwasher error E15 means the safety switch has detected water in the base of the dishwasher and the leakage protection system has activated. Bosch’s own instruction is to turn off the water supply and call for service rather than to keep running the machine.	Leaking	High	Major repair
E1	—	E1, read back from a Bosch dishwasher’s fault memory, means a heating problem: either the water level is too low for the heater to switch on, or the flow switch or heater has failed.	Heating	Medium	Major repair
E2	—	E2 in the fault memory means the temperature sensor (the NTC) is defective. Reaching it means removing the tub, so there is nothing to check from the front.	Sensor	Medium	Major repair
E3	—	E3 in the fault memory means the dishwasher is not filling. The check is the supply valve and the screen in the water inlet valve.	Not filling	Low	Major repair
E4	—	E4 in the fault memory means the water switch is defective. Reaching it means removing the tub.	Sensor	Medium	Major repair
E5	—	E5 in the fault memory means the dishwasher overfilled. If it keeps filling after the power is cut, the inlet valve is not closing.	Overflowing	High	Major repair
E6	—	E6 in the fault memory means the aqua sensor is defective. That is the sensor which measures how dirty the water is.	Sensor	Medium	Major repair
E0	—	E0 is not a fault. It is what a Bosch dishwasher shows in diagnostic test mode when the control memory holds no stored fault code.	Not a fault	Info	Free check
E01	—	E01 is a fault in the heat pump motor circuit, reported at the main control board.	Control board or panel	Medium	Free check
E02	—	E02 is a relay fault on the main control board.	Control board or panel	Medium	Free check
E03	—	E03 is a relay fault on the main control board.	Control board or panel	Medium	Free check
E09	—	E09 is a fault in the heat pump's internal heater.	Heating	Medium	Free check
E14	—	E14 reports a flow meter failure, or a problem with water reaching the dishwasher through the filling system.	Not filling	Low	Major repair
E16	E17	E16 and E17 report a problem with water getting into the dishwasher; it may not be filling at all.	Not filling	Low	Free check
E18	—	E18 means water is not flowing into the dishwasher as it should: the level is too low, or the water is not being pumped correctly.	Not filling	Low	Free check
E20	—	E20 is a fault in the heat pump's internal heater.	Heating	Medium	Free check
E23	—	E23 is a drain pump problem — the pump is blocked, clogged, or has failed.	Not draining	Medium	Major repair
E27	—	E27 means the power supply reaching the dishwasher is too low.	Power	Medium	Free check
E0100	—	E0100 is a fault in the heat pump motor circuit, reported at the main control board.	Control board or panel	Medium	Free check
E6001	—	E6001 is a fault in the heat pump's internal heater.	Heating	Medium	Free check
E8000	—	E8000 is a door sensor circuit fault.	Door or lid lock	Medium	Free check

Before you check anything

Disconnect the power first. Unplug the machine at the socket, or switch off its circuit at the consumer unit if it is hard-wired. Do this before opening any panel, reaching into a pump filter, or moving the appliance.
Turn off the water before disconnecting a hose, and have a towel and a shallow tray ready — a drain hose holds water even when the drum looks empty.
Gas, mains wiring and sealed refrigeration are for a qualified professional — in many countries that is a legal requirement, not advice. If you smell gas, do not touch any switch: leave, and call your gas emergency number from outside.
Stop if you smell burning, see scorched wiring, or find water near an electrical connection. None of those is a code to look up.

The checks on this page are the manufacturer’s own, rewritten and sourced, and they are reference information rather than a repair instruction for your particular machine. Model, age and installation all change what is safe to do. You are the one standing in front of it — if a step looks wrong for the machine you have, trust that and call a technician.