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Bosch dishwasher error codes: what each one means

Use this table to match the code on a Bosch dishwasher display with the system the control is flagging. Start with the first safe check only, and stop if the code points to a part or control fault.

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Reading the code

Most Bosch dishwashers show E codes on a digital display, while some models use flashing lights or beeps. To clear a stored code after a safe check, unplug the dishwasher or switch the breaker off for 1 minute, then restore power; many models also cancel a cycle by holding Reset 4 Sec. or Start for about 4 seconds. h:01, h:02 and similar h numbers during normal operation are delay start status messages rather than faults. In a setup menu, H:01 can be a water hardness setting. Low salt or rinse aid indicators are refill reminders.

Have the model number ready

The company will ask for it first. It's on a sticker or metal plate, usually in one of these spots:

Where the model tag usually is on a dishwasher12
  1. Open the door: on the left or right edge of the tub or door
  2. Some models: on the top edge of the door

Bosch dishwasher error codes

Bosch support pages list two digit E codes and four digit E codes; this table pairs them when the definitions match.

29 codes

CodeWhat it meansCheck firstUsually
E15 / E3100The leak protection switch detected water in the base of the dishwasher, and on some models flashing Active lights can point to the same fault.Needs a technician because water in the base means the leak source must be located; unplug the dishwasher and turn off the water supply first.Usually a technician
E24 / E-24 / E6103The dishwasher is not draining properly, often because the drain filter or drain path is blocked; on some models, four LEDs flashing or flashing Active and Clean lights can point to this drain fault.Unplug the dishwasher, clean the filter, make sure the pump cover under the filter is locked, and check the air gap or disposer connection if it is visible.Often a home check
E25 / E-25 / E6102The drain pump or drain path is blocked, or the drain pump cover is loose.Unplug the dishwasher, remove the filter, make sure the pump cover is locked, and remove loose debris you can reach with caution.Often a home check
E22 / E-22 / E9240The dishwasher filter, drain pump, pump cover, drain hose, or air gap may be restricted, and E9240 or E92-40 can point to the same issue.Unplug the dishwasher, remove and rinse the filter, brush away debris, and reinstall the filter fully.Often a home check
E09 or E20 / E2030 or E6001The heat pump internal heater has a fault; on some models, flashing Active and Sanitized lights or flashing Clean and Sanitized lights can point to the same heater fault.Needs a technician because the control is detecting a heat pump heater fault that is not a safe homeowner repair.Usually a technician
E18 / E3200The control is seeing low water level, or water is not being pumped correctly.Unplug the dishwasher, confirm the water supply valve is open, and check that the inlet hose is not kinked or crushed.Often a home check
E16 or E17 / E3300 or E3400The dishwasher has an issue with water entering the appliance or with the filling system.Unplug the dishwasher, confirm the water supply valve is open, and check the inlet hose for visible kinks or damage.Often a home check
E14 / E3000The control detected a flow meter failure or a filling system problem.Unplug the dishwasher, confirm the water supply is on and the inlet hose is not kinked; if the code returns, a technician needs to check the flow sensing system.Usually a technician
E23 / E6101The drain pump is blocked, clogged, or faulty.Needs a technician if cleaning the filter and visible pump cover area does not clear it, because the drain pump may be faulty.Usually a technician
E27 / E9001The house power supply to the dishwasher is too low.Needs a qualified electrical technician because incoming supply voltage may be too low; disconnect power and do not meter live wiring.Usually a technician
E12 / E2060Limescale has built up in the heat pump, so the dishwasher needs descaling.Unplug before inspection, then follow the model manual for descaling and use dishwasher salt if your model has a softener.Often a home check
E01 / E0100There is a heat pump motor circuit fault at the main control board.Needs a technician because the control is detecting a heat pump motor circuit fault at the main control board.Usually a technician
E02 / E0103There is a main control board relay fault.Needs a technician because the control is detecting a main control board relay fault.Usually a technician
E03 / E0107There is a main control board relay fault.Needs a technician because the control is detecting a main control board relay fault; on some models, flashing Sanitized lights can point to this relay fault.Usually a technician
E04 / E0105The dishwasher self test detected faulty heater electronics.Needs a technician because the dishwasher detected faulty heater electronics during self test.Usually a technician
E05 / E0106There is a wash arm diverter circuit fault at the main control board.Needs a technician because this points to the wash arm diverter circuit at the main control board.Usually a technician
E06 / E8000There is a door sensor circuit fault; on some models, flashing Clean lights can point to the same door sensor fault.Needs a technician if closing the door firmly and resetting power does not clear it, because the door sensor circuit may have failed.Usually a technician
E07 / E2130The Zeolite or Crystal Dry fan motor is defective.Needs a technician because the Crystal Dry fan motor is a component fault inside the drying system.Usually a technician
E10 / E2120There is a Zeolite or Crystal Dry chamber heater fault.Needs a technician because the Crystal Dry chamber heater is a component fault inside the drying system.Usually a technician
E19 / E6900There is a detergent dispenser solenoid circuit fault.Needs a technician because the detergent dispenser solenoid circuit may have failed.Usually a technician
E21 / E6002The heat pump is blocked.Needs a technician because the heat pump blockage is inside the circulation and heating system.Usually a technician
E0110The electronics have a communication failure.Needs a technician because the control electronics are not communicating correctly.Usually a technician
E6160The controlled lower spray arm reference position was not found.Needs a technician because the controlled lower spray arm reference position is not being found.Usually a technician
h:01 / h:02Delay start is set during normal operation; this is a status message, not a fault. In a setup menu, H:01 can be a water hardness setting.Use the plus or minus setting to return a delay display to h:00, or cancel the cycle with the reset control.Often a home check
Water tap symbol / Check water lightThe dishwasher is signaling a water supply problem, such as a closed supply valve or a blockage.Unplug the dishwasher, confirm the water supply valve is open, and check that the inlet hose is not kinked.Often a home check
Low salt indicatorThe dishwasher salt reservoir needs refilling on models with a water softening system.Unplug before inspection, then refill the salt reservoir if your model has a water softener.Often a home check
Rinse aid refill indicatorThe rinse aid dispenser needs refilling.Unplug before inspection, then refill the rinse aid dispenser and wipe up spills around the cap.Often a home check
Red floor lightA steady red floor light means the dishwasher is running; a blinking red floor light usually means the door is not fully closed.If it is blinking, press the door closed firmly and check that nothing is blocking the latch. Then restart or look for a displayed code.Often a home check
No numeric codeOn some models, four LEDs flashing with beeping indicates a technical issue rather than a specific numeric code.Needs a technician because the no display light and beep pattern indicates a technical issue; disconnect power and turn off the water supply first.Usually a technician

Don't see your symptom?

Describe it on the phone. The company on the other end works on these every day and will know what to ask.

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Common questions about appliance repair

How do I reset a Bosch dishwasher code?

After a safe check, hold Reset 4 Sec. or Start for about 4 seconds to cancel a cycle, or disconnect power for 1 minute. If the code returns, use the table instead of clearing it again.

Why does E24 or E25 come back after I clean the filter?

The pump cover may not be locked, the drain hose or air gap may still be restricted, or the drain pump may have a fault. Stop after the safe checks in the table and use a technician if the code returns.

Are two digit E codes and four digit E codes the same kind of problem?

Bosch support pages list two digit E codes and four digit E codes. This table pairs them when the definitions match.

Is h:01 or H:01 a fault code?

No. h:01, h:02 and similar h numbers during normal operation usually mean delay start. In a setup menu, H:01 can be a water hardness setting, not a fault.

Still showing the problem after the checks?

Call and describe what you tried. You'll be connected with an independent repair company near you.

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