Bosch Dishwasher E13 Error: Water Too Hot Safety Shutdown
Updated: February 2026
The Bosch E13 error code is a critical safety alert indicating water temperature has exceeded safe limits. The dishwasher immediately stops operation to prevent damage to components and dishes.
Understanding E13
Dishwashers heat water to approximately 140-160°F for optimal cleaning. E13 appears when temperature exceeds safety thresholds (typically above 185-195°F). This excessive heating can warp plastic components, damage dishes, and poses a burn hazard when opening the door.
Causes and Solutions
- Step 1: Allow the dishwasher to cool completely before investigating. Don't open the door when E13 first appears—steam and hot water present burn risks.
- Step 2: The most common cause is a stuck heating element relay on the control board. The relay stays closed, continuously powering the heating element even when it should turn off.
- Step 3: Check incoming water temperature. If your home water heater is set too high (above 140°F), combined with dishwasher heating, temperatures can reach dangerous levels. Lower water heater temperature to 120°F.
- Step 4: Test the thermistor (temperature sensor). If it's failed or providing incorrect readings, the control board can't properly regulate heating. Test thermistor as described in E11 error guide.
- Step 5: Inspect the heating element for shorts. A partially shorted element may draw continuous current and overheat.
- Step 6: Access the control board and visually inspect relays. Look for burn marks, melted components, or stuck relay contacts.
- Step 7: If the relay is stuck closed or control board shows damage, the entire control board requires replacement. This is the most common repair for persistent E13 errors.
E13 is serious—don't ignore it. Operating with stuck heating creates fire risks and damages internal components. After replacing faulty parts, run a test cycle while monitoring temperature (use an infrared thermometer through the door vent). Water should stabilize at 140-160°F. If E13 returns, suspect multiple component failures requiring professional diagnosis.
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