E34
Bosch Dishwasher
Severity: CriticalWhat Does This Error Mean?
The E34 error on a Bosch dishwasher means the AquaStop flood protection system has detected water in the base pan at the bottom of the machine. This is a serious warning — it means water has leaked inside the dishwasher body, not just in the wash tub. Bosch automatically locks the machine and activates the drain pump to remove the water.
Affected Models
- SHPM88Z75N
- SHPM65Z55N
- SHEM63W55N
- SHPK7TL5UC
- All Bosch dishwashers with AquaStop
Common Causes
- A water supply hose inside the dishwasher has cracked or a connection has come loose
- The door seal (gasket) has worn out and water is leaking through the door edge
- The wash pump or circulation pump has a seal failure, leaking water into the base
- A spray arm has cracked or detached and is directing water toward the side walls
- Excessive foam from using regular dish soap (instead of dishwasher detergent) has overflowed into the base
How to Fix It
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Do not run another cycle — stop using the dishwasher immediately.
Running cycles with water in the base pan can cause further damage to the motor and electronics.
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Tilt the dishwasher carefully toward you at about 45 degrees to drain water from the base pan.
Place towels on the floor first. This is a temporary fix to let the float switch reset — it does not fix the leak source.
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Once tilted, stand it back upright and check if E34 clears after a few minutes.
If the error clears, the float switch has reset. But this only removes the symptom, not the cause.
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Inspect the door seal around the inside edge of the door for tears, gaps, or debris.
Run a finger along the entire gasket — if you find a soft spot, crack, or loose section, the seal needs replacement.
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Do not put the dishwasher back into regular use until the leak source is identified and repaired.
Call a Bosch-certified technician to inspect the internal hoses, pump seals, and water connections.
When to Call a Professional
E34 is a serious error that requires immediate professional attention. Do not attempt to run the dishwasher again until the source of the leak is found and repaired. Water in the base pan can damage the control board and motor if left unaddressed. Contact a Bosch-certified technician — this repair is not DIY-friendly. Repair costs vary widely: $150–$400 depending on what is leaking.
Frequently Asked Questions
What is AquaStop and how does it work in a Bosch dishwasher?
AquaStop is Bosch's built-in flood protection system. A float switch sits in the base pan of the dishwasher. If any water leaks into the base, the float rises and triggers the switch. The dishwasher then immediately locks, activates the drain pump, and shows E15 or E34 depending on the fault severity. AquaStop is what prevents a small leak from becoming a flooded kitchen.
Can using too much dish soap cause E34 on a Bosch dishwasher?
Yes — using regular hand dish soap or even too much dishwasher detergent causes excessive suds. Those suds can overflow from the tub into the base pan and trigger the AquaStop float. Only use dishwasher-specific detergent in the correct amount. If suds caused E34, tilt the machine to drain the base, then run two empty rinse cycles to flush out the soap.
Is E34 the same as E15 on a Bosch dishwasher?
Both E15 and E34 relate to water in the base pan and the AquaStop system. E15 is the most common code and indicates the AquaStop float has been triggered. E34 is a more specific variant that some Bosch models display when the flood protection system is active alongside an additional sensor fault. In practice, the diagnosis and fix steps are very similar for both codes.