Error code reference

Bosch Dishwasher Error Code E5

Safety float water level reached or motor speed error (error code is dependent on model

Bosch codesBosch dishwasher codes

Safety float water level reached or motor speed error (error code is dependent on model — check test program for the specific model).

First step from the service manual

Check the float and float switch, check if water is in the base, and check if the water inlet valve has re-seated after closing.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What E5 means on a Bosch dishwasher

Bosch E5 is a dual-purpose code depending on the model: it signals either that the safety float in the base pan has been triggered by accumulated water, or that the control board has detected a motor speed error during the wash cycle. Because the specific trigger varies by model, running the Bosch test program is the fastest way to confirm which fault applies before proceeding with diagnosis. The float switch circuit and the motor tachometer circuit are the two primary systems involved.

For most homeowners, E5 most often means water has leaked into the bottom base pan of the dishwasher and lifted a small plastic float, which trips a switch and stops the machine to prevent overflow or further damage. This is a safety feature, not a malfunction in itself. The real problem is finding where the water came from. Common sources include a water inlet valve that did not fully close after a fill cycle, a leaking door seal, or a hose connection that has worked loose inside the cabinet.

If the base pan is dry and E5 still appears, the fault is likely motor-related, pointing to a tachometer or wiring issue on the circulation pump. Both fault types require hands-on inspection before parts are ordered.

Source: manufacturer service documentation.

Common causes of E5

  1. 01

    Water in the base pan triggering the safety float switch

    Wiring / connection

    Water accumulates in the drip tray beneath the wash tub and lifts the polystyrene float, which presses the float switch and sends the E5 signal to the control board. The water must be removed and the leak source identified before the machine will reset.

  2. 02

    Water inlet valve not fully closing after fill cycle

    Part replacement

    A worn or debris-fouled inlet valve solenoid can allow water to slowly drip into the tub after the fill cycle ends, eventually overflowing into the base pan. Cycling power will not fix this because the valve continues to seep when the dishwasher is idle.

  3. 03

    Faulty or stuck float switch

    Part replacement

    The float itself can become physically stuck in the raised position due to debris or a warped float body, or the micro-switch it actuates can fail electrically, sending a constant fault signal to the board even when no water is present in the base pan.

  4. 04

    Motor speed or tachometer fault on the circulation pump

    Part replacement

    On models where E5 indicates a motor speed error, the tachometer sensor on the circulation pump reports an out-of-range speed reading to the control board during the wash cycle. This can result from a failing tachometer, a wiring fault in the harness between the pump and board, or a seized pump impeller.

See the test procedure for each cause

Frequently asked questions about E5

What does E5 mean on a Bosch dishwasher?
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.
Is it safe to keep using my Bosch dishwasher with an E5 error?
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.
How do I fix E5 on a Bosch dishwasher?
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.
How much does it cost to repair a Bosch dishwasher E5 error?
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.
Why does my Bosch dishwasher show E5 even though there is no water in the base?
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.

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