Bosch Dishwasher Error Code E5

E5 on a Bosch dishwasher means either the safety float in the base pan has detected standing water beneath the tub, or the control board has registered a motor speed error on the circulation pump. Which fault applies depends on your specific Bosch model. Running the built-in test program will help confirm which system triggered the code before you start disassembling anything.

Start by pulling the dishwasher out slightly and tilting it forward to drain any water from the base pan, then check whether the float and float switch move freely and function correctly. Next, run a short cycle and watch the inlet valve area to see if water continues dripping after the fill phase ends. If the base pan is dry and the float is fine, run the Bosch test program to check for a motor speed fault and inspect the wiring harness between the pump and control board. Replacing a faulty inlet valve or float switch is within reach for a confident DIYer; motor and control board faults are better handled by a technician.

If the base pan is completely dry but E5 persists, the float switch itself is likely stuck in the triggered position or has failed electrically, or the fault is a motor speed error rather than a float fault. Use the Bosch test program to distinguish between the two. Check the float for physical obstructions and test the switch for continuity with a multimeter. If the switch checks out, move your diagnosis to the circulation pump tachometer and its wiring harness.

No. If E5 is caused by water in the base pan, running the machine risks electrical damage and continued leaking onto your floor. If it is a motor speed error, the dishwasher will not wash effectively and may damage the pump by running it incorrectly. The machine is designed to stop operation when E5 is active, and you should not attempt to override it until the underlying cause is resolved.

If the fix is simply draining the base pan and repositioning a stuck float, the cost is minimal, just your time. A replacement float switch typically costs $10 to $30 in parts. A new water inlet valve runs $25 to $60. If the fault is motor-related and requires a new circulation pump or tachometer, parts range from $80 to $200, and professional labor typically adds $100 to $200 depending on your area. Getting a firm diagnosis before ordering parts will prevent unnecessary spending.