Bosch Dishwasher Error Code E13 — Water Temperature Too High
What this means
The E13 error indicates that the water entering the dishwasher is too hot — typically above 176°F (80°C). This usually means the household hot water heater is set too high, or the NTC sensor is misreading the water temperature. Excessively hot water can damage dishwasher components and plastic parts.
Step-by-step fix
3 stepsCheck your water heater temperature
Your home water heater should be set to 120°F (49°C). If it is higher, lower the setting and wait 1–2 hours for the tank to cool.
Many water heaters are factory-set to 140°F, which is too hot for most dishwashers.
Run the hot water tap
Before starting the dishwasher, run the hot water tap at the kitchen sink until it feels warm but not scalding. This purges any overly hot water from the line.
This is a good practice before every dishwasher cycle for better cleaning results.
Test the NTC sensor
If the water heater is set correctly and the error persists, the NTC temperature sensor may be reading incorrectly. Test it with a multimeter.
A faulty sensor reading high will trigger E13 even with normal water temperature.
When to call a professional
If your water heater temperature is correct and the sensor tests fine, contact a technician for further diagnosis.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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