Bosch Dishwasher Error E3400

How to Fix E3400 Error (Step-by-Step) Turn off the dishwasher by pressing the power button and then shut off the water supply from the main valve, usually located under the sink.Carefully pull the dishwasher out from the cabinet to access the water inlet hose at the back.Check the water inlet hose for any kinks or sharp bends that could be restricting water flow. Straighten the hose if necessary.Unscrew the water inlet hose from the back of the dishwasher. Have a towel ready to catch any residual water.Inspect the small filter screen inside the water inlet connection on the dishwasher. If it's clogged with debris, gently remove it with needle-nose pliers and rinse it thoroughly under running water.Reconnect the hose, ensuring it's securely tightened. Turn the water supply back on and check for any leaks before sliding the dishwasher back into place.Turn the appliance off, wait about 2 minutes, then turn it back on.

What to Check Next on This Bosch Dishwasher Bosch Dishwasher Error E3400: Use the code or symbol as the starting clue, then confirm the actual symptom before ordering parts. Confirm whether the display is a normal cycle/status symbol or a recurring fault that stops operation. Check water supply, filter, sump, spray arms, drain path, and door latch before replacing electronic parts. If the same problem returns after basic checks, inspect the matching sensor, pump, heater, wiring, or control path based on the symptom. If the issue returns after these checks, match replacement parts to the complete Bosch model number from the appliance tag. The same code can point to different components depending on the exact model and when the failure appears. Recommended Parts to Check No exact official OEM part number is listed here because the correct Bosch dishwasher part can vary by complete model number. These are targeted part-category searches, not universal fit claims. Bosch dishwasher water inlet valve Common replacement category: Water inlet valve Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for fill and water-supply faults after the tap, hose, and inlet screen are checked. Search Amazon for Bosch dishwasher water inlet valve Bosch dishwasher drain pump Common replacement category: Drain pump Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for drain and standing-water symptoms after the filter, sump, and hose are checked. Search Amazon for Bosch dishwasher drain pump Bosch dishwasher circulation pump Common replacement category: Circulation pump / wash motor Fit note: Exact OEM part number varies by full Bosch dishwasher model number. Confirm compatibility before buying. Confidence: MediumThis category can be relevant for wash, spray-arm, and circulation symptoms after filters and spray arms are checked. Search Amazon for Bosch dishwasher circulation pump Before ordering: match the part to the complete Bosch dishwasher model number on the appliance tag.