Bosch Dishwasher Error Code E13

Understanding Bosch Dishwasher Error Code E13

The Bosch dishwasher error code E13 is a diagnostic indicator that something is preventing normal water sensing or flow within the machine. On many Bosch models E13 is tied to water intake and monitoring systems (flow meter, pressure/level sensors or related electronics), and can appear when the dishwasher detects no water flow, inconsistent water levels, or an unexpected signal from the water-sensing components. When E13 appears you might notice the cycle stops or won’t start, washed items remain dirty, the cycle runs longer than normal, or the appliance may try to repeat fill/drain attempts. In some cases an unresolved E13 condition can increase the risk of overfilling or poor cleaning performance; left unattended it may cause repeated failed cycles and unnecessary wear on pumps and valves.

Common Causes

• Interrupted or low household water supply / low inlet pressure
• Kinked, blocked, or frozen water inlet hose
• Clogged or dirty inlet filters/strainers at the hose connection or valve
• Faulty or failing water inlet valve (solenoid valve)
• Defective flow meter (water flow sensor) or pressure sensor
• Stuck or faulty float switch or anti-flood (AquaStop) device
• Obstruction in the circulation or drain path causing sensor confusion
• Loose or corroded wiring / connectors to sensors or main control board
• Malfunctioning control board (rare but possible)
• Hard water scale or debris coating sensors and impeding accurate readings

Troubleshooting Steps

1. Turn off power and water: For safety, switch the dishwasher off at the breaker and close the water supply before inspecting components.
2. Check household water supply: Ensure the kitchen tap supplying the dishwasher has normal pressure and flow. Low pressure will affect fill behavior.
3. Inspect inlet hose: Look for kinks, sharp bends, or visible damage. Remove the hose and run water through it to confirm it’s not clogged.
4. Clean inlet filters/strainers: At the hose connection and valve inlet there are small screens that trap debris—remove and clean them carefully.
5. Run a diagnostic or service mode (if available): Many Bosch dishwashers offer a test program that logs sensor readings — consult your manual for model-specific steps.
6. Check the float and anti-flood area: Remove the base kickplate (if comfortable) and confirm the float or AquaStop mechanism isn’t jammed with debris or tilted.
7. Examine wiring and connectors: Look for loose, crushed or corroded wiring to the water inlet valve, flow meter, float switch, and control board. Re-seat connectors if necessary.
8. Test or replace the flow meter/inlet valve: If you have a multimeter and the model’s service manual, test the solenoid resistance and sensor continuity. Replace the faulty component if it fails tests.
9. Descale the machine: If hard water is an issue, run a descaling cycle or use manufacturer-recommended descaler to remove scale on sensors and plumbing.
10. Reset the dishwasher: After inspections or minor fixes, restore power and run a short cycle to see if E13 clears. If it persists, avoid repeated attempts and proceed to professional service.

Maintenance / Prevention Tips

• Keep the water inlet hose straight and free from kinks; replace it every 5–7 years or if damaged.
• Clean the inlet filters/strainers regularly (every 3–6 months) to prevent debris buildup.
• Run a cleaning or descaling cycle quarterly if you have hard water.
• Install a simple water pressure gauge to confirm steady household water pressure if you experience frequent fill issues.
• Use a pre-filter on the home supply if your municipal water has high sediment.
• Inspect the base pan and float area annually for debris or corrosion that can trap the float.
• Avoid overloading the dishwasher which can affect water circulation and sensor readings.
• Use manufacturer-recommended detergents and rinse aids to reduce sensor-fouling residue.
• During winter, protect external hoses from freezing or drain and disconnect if the home will be unheated.
• Replace weak or aging rubber hoses proactively rather than waiting for failure.
• Listen for unusual fill/drain noises — they often precede sensor-triggered errors.
• Schedule periodic professional maintenance if the dishwasher is heavily used (e.g., commercial or large family households).
• Keep the dishwasher’s electrical connections dry and the control panel free of moisture.
• Follow Bosch’s recommended service intervals and software updates when applicable.
• When installing, ensure inlet hoses are connected without strain and the water shutoff is easy to reach.

FAQs

Conclusion / Safety Notice

When you see E13 on a Bosch dishwasher take it seriously: stop the cycle, turn off the water and power, and follow the safe troubleshooting steps above. Many E13 causes are non-emergency and can be resolved by cleaning filters, checking hoses, or replacing a sensor, but if you encounter signs of water leakage, persistent errors after basic troubleshooting, or you’re not confident with electrical or plumbing tasks, contact a certified appliance technician. Professional service prevents accidental damage and ensures the repair is safe and long-lasting.

For reliable results, consult your Bosch user manual for model-specific code definitions and keep your model number handy when contacting Bosch support or a service pro.