Bosch Dishwasher Error Code E19

Bosch Dishwasher Error Code E19 — What It Means

The E19 error on Bosch dishwashers is a warning that the appliance has detected an abnormal condition related to water management or leak detection. Depending on the model and control software version, E19 commonly points to a triggered leak/overflow detection (base pan/float switch), a drainage or circulation fault that has caused water to collect where it shouldn’t, or, less often, an associated electrical or heater/thermostat fault that affects water handling. When E19 occurs you may notice the dishwasher stopping mid-cycle, water pooled in the bottom of the unit or the base pan, longer or failed drying cycles, unusual noises, or the dishwasher refusing to start until the fault is cleared. If left unattended, E19 can increase the risk of water damage to cabinetry and flooring and create an electrical hazard if water reaches control components.

Common Causes

• Activated base pan float or leak detection sensor (water in the base tray)
• Clogged or restricted drain pump, filter, or drain hose causing water backup
• Faulty drain pump or circulation pump not removing water properly
• Loose, cracked, or disconnected drain or inlet hoses allowing leaks
• Worn door gasket or loose door latch allowing water to escape during cycles
• Faulty water inlet valve or excessive incoming water pressure
• Failed control board or sensor communication error (rare, model-dependent)
• Blocked sump area with debris or broken glass preventing proper drainage

Troubleshooting Steps

1. Power and water safety: Turn off and unplug the dishwasher, and shut off the water supply before inspecting. This prevents electrical shock and further water flow.
2. Check for visible water: Gently pull the dishwasher out and look under the unit for water in the base pan. If you find water, carefully soak it up with towels; a wet/dry vacuum helps.
3. Inspect the base pan float: Locate the small float or sensor in the base pan area and make sure it moves freely. Clean any debris that may pin it down. If the float is stuck in the up position, that can trigger E19.
4. Examine hoses and clamps: Inspect the drain hose, inlet hose, and any visible connections for cracks, holes, loose clamps, or kinks. Tighten or replace damaged hoses.
5. Clean filters and sump: Remove and clean the filter assembly and check the sump for debris, glass, or food particles that can block drainage or damage the pump.
6. Check the drain pump: With the unit powered off, access the drain pump area and ensure the impeller isn’t jammed. If the pump is noisy or not spinning freely, it may need replacement.
7. Test drain path: Run a short rinse with the sink disposal cleared and watch whether water drains properly. Also check that the air gap or high-loop on the drain hose is intact.
8. Reset the dishwasher: After removing visible water and checking parts, restore power and run a short diagnostic or a rinse cycle to see if the fault clears. Some models will clear after the float dries and the unit is reset.
9. Inspect the door seal and tub for leaks: Check the door gasket for tears and the door latch for correct alignment; replace or adjust as needed.
10. When to call a technician: If you find electrical damage, persistent leakage after clearing, a failed pump, or if resetting does not clear the code, contact an authorized Bosch service technician to diagnose control board, sensor, or sealed-component failures.

Maintenance / Prevention Tips

• Keep the filter and sump clean by rinsing the filter after each cycle and deep-cleaning monthly.
• Run the dishwasher on a hot cycle with dishwasher cleaner or a cup of white vinegar once a month to remove buildup.
• Avoid placing large food particles or shells in the dishwasher; scrape plates before loading.
• Check hoses and clamps yearly for cracks, kinks, or loose fittings; replace aging hoses every 5–7 years.
• Ensure the drain hose has a proper high-loop or air gap to prevent backflow.
• Secure and test the door latch and gasket to keep a watertight seal during cycles.
• Don’t overload the dishwasher; overcrowding can cause water to spray toward the door and escape.
• Use the recommended detergent and rinse aid quantities to reduce suds and residue that can clog drains.
• Inspect beneath the dishwasher for signs of slow leaks or moisture staining periodically.
• Keep the area under and behind the dishwasher accessible so leaks show up quickly and can be addressed.
• Run a rinse cycle after meals that produce a lot of grease or food debris.
• Check and clear the garbage disposal and sink drain if dishwasher drainage seems slow.
• Use a wet/dry vacuum to remove water from the base pan immediately if you detect pooling.
• Replace worn door seals promptly rather than waiting for them to fail completely.
• Schedule professional maintenance every few years if the dishwasher gets heavy use.
• When relocating the dishwasher, inspect all connectors and the base pan for damage before reconnecting.

FAQ

Conclusion / Safety Notice

If you see E19 on your Bosch dishwasher, prioritize safety: turn off power and water supply, and inspect for visible leaks. Minor issues like a stuck float or clogged filter are often fixable by a careful DIYer. However, if you find electrical damage, a failed pump, persistent leaks, or if the code returns after resets and basic checks, stop using the dishwasher and contact a qualified Bosch technician. Water and electricity together can be hazardous — when in doubt, let a professional diagnose and repair the appliance to protect your home and safety.

For best results, consult your model’s user manual for model-specific diagnostics and Bosch support for authorized service and genuine replacement parts.