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Bosch Error Codes

Pick the code your Bosch appliance is showing. Each page explains what the code means, the most likely causes ranked by probability, and which fixes are safe to try before calling a technician.

Bosch Dishwasher Codes

E15 Water reached the base pan under the tub and Bosch's leak protection locked the machine — sometimes a genuine leak, often a one-off spill or condensation that clears once the base dries.
E24 The dishwasher can't drain properly — start with the filter, then the drain hose path, and don't skip checking that the drain pump cover is seated.
E25 The drain pump itself is blocked or its cover is loose — and Bosch makes the pump cover owner-accessible, so this is one of the most fixable codes the brand throws.
E09 The heating system isn't raising the water temperature — beyond one reset, the flow-through heater is a mains-voltage part that belongs to a technician.
E14 The flow meter that counts water into the machine stopped making sense, so filling can't be trusted — a reset and supply check first, then it's a sensor-level repair.
E17 Water isn't getting into the dishwasher the way the filling system expects — Bosch groups E17 with E16 as an inflow problem, and a kinked or damaged inlet hose is the first thing to check.
E01 Bosch's control board has flagged a fault in the circuit that drives the heat pump motor — the part that both circulates and heats the water — so beyond a single power reset, E01 is a board-level repair for a technician.
E02 A switching relay on the Bosch dishwasher's main control board is not behaving as the electronics expect — Bosch reports this as both E02 and E03 — so try one power reset, then it is a board-level repair.
E04 During its power-on self-test the Bosch dishwasher found a fault in the heating electronics, so it shows E04 and holds back rather than energising the heater — a technician diagnosis after a single reset.
E05 The circuit that runs the diverter — the valve that switches water between the upper and lower spray arms — has faulted on the Bosch control board, so after one reset E05 is a technician repair.
E06 Bosch's E06 means the door-sensing circuit faulted — on most recent models the latch's reed switch cannot detect that the door is shut — so check the door closes firmly, reset once, then call a technician.
E07 On Bosch dishwashers with CrystalDry, E07 means the zeolite drying fan motor has faulted — the fan that pushes warm air over the drying mineral — so after one reset it is a technician repair on those models.
E12 E12 is not a breakdown — it is Bosch telling you limescale has built up in the heat pump and the dishwasher needs descaling, which you can do yourself with a dishwasher descaler.
E18 Bosch's E18 means the dishwasher is not getting enough water — the level stayed too low — so check the inlet hose, the supply valve, and that water actually reaches the machine before calling for service.
E19 E19 means the circuit that releases the Bosch detergent dispenser has faulted — the solenoid that pops the flap open mid-cycle — so clear any residue, reset once, then expect a technician repair.
E22 E22 is one of the most fixable Bosch codes: the filter at the bottom of the tub is blocked and water is backing up in the sump, so cleaning the filter usually clears it.
E23 E23 means there is an issue with the drain pump — Bosch says it happens when the pump is blocked, clogged or faulty, and directs owners to its customer support.
E27 E27 means the house power supply to the dishwasher is too low — reset the breaker, and if the code comes back, Bosch's advice is to have an electrician check the incoming voltage.
E21 E21 means the heat pump is blocked — Bosch says to reset power at the breaker for 30 seconds and to call its customer support if that does not resolve it.
E10 E10 is a fault in the Zeolite (CrystalDry) chamber heater — Bosch says to reset power at the breaker for 30 seconds and to call its customer support if the code returns.

Bosch Washer Codes

Bosch Dryer Codes

Bosch Refrigerator Codes

Bosch Oven Codes