E10
Bosch Dishwasher
Severity: ModerateWhat Does This Error Mean?
The E10 error means your Bosch dishwasher took too long to heat the water to the required temperature. The machine has a time limit for heating — if it is exceeded, the cycle stops. This protects the dishwasher from running indefinitely with a faulty heating system.
Affected Models
- Bosch 300 Series
- Bosch 500 Series
- Bosch 800 Series
- Most Bosch built-in dishwashers
Common Causes
- Heating element is losing efficiency and cannot reach temperature in time
- Incoming water is extremely cold (very cold weather or cold water supply connection)
- NTC temperature sensor is giving incorrect readings, causing the machine to heat for too long
- Wash pump is not circulating water properly across the heating element
- Low household voltage is reducing heating element performance
How to Fix It
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Run the kitchen hot water tap for 60 seconds before starting a dishwasher cycle.
This pre-heats the water in the pipes and reduces the work the dishwasher heating element must do.
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Make sure the dishwasher is connected to the hot water supply under the sink.
Connecting to cold water dramatically increases heating time and commonly causes E10.
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Power cycle the dishwasher — unplug for 5 minutes, restore power, and try again.
A reset clears temporary faults in the NTC sensor readings.
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Check the household voltage at the outlet with a voltage meter.
Voltage below 110V reduces heating element output significantly.
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If E10 persists with hot water supply and normal voltage, contact a technician to test the heating element and NTC sensor.
A degraded heating element that still works partially is a common cause of E10 in older machines.
When to Call a Professional
If running hot water to the pipes before starting and a power reset do not resolve E10 — the heating element or NTC sensor is underperforming. A technician should test both components and replace the faulty one. Expect $120–$280 for repair including labor.
Frequently Asked Questions
How is E10 different from E01 on a Bosch dishwasher?
Both are heating-related, but E01 means the heating system completely failed (no heat at all). E10 means heating is working but taking too long — the element is likely degraded, not dead. E10 often appears first, and if ignored, can progress to E01 as the element fails further.
Can cold water supply really cause an E10 error?
Yes — in winter, cold water supply temperatures can drop to 45–55°F (7–13°C). Heating that cold water to 140–160°F (60–70°C) for a hot wash cycle takes significantly longer. Connecting to hot water supply and pre-running the tap often resolves seasonal E10 errors completely.
How long should a Bosch dishwasher take to heat water?
Depending on the cycle, Bosch dishwashers typically heat water to operating temperature within 15–30 minutes. If it consistently takes longer than 45 minutes, the heating element is likely degraded. A technician can test the element's wattage output to confirm.