e02
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Bosch · Dishwashers
Heater relay fault on control board
Quick Answer
Error code E02 on your Bosch Dishwashers means: Heater relay fault on control board. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Turn off the dishwasher and unplug it for 30 seconds, then restart.
2
If you want to attempt a DIY fix, test the thermistor resistance with a multimeter.
3
Replace the temperature sensor or thermistor if readings are out of specification.
4
If the thermistor is fine, the control board heater relay has failed and requires professional replacement.
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
Parts You May Need
Temperature sensor / thermistor
Main control board
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