Question about Bosch 24 in. SGS43E02 Exxcel Built-In Dishwasher

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Water will not drain.

During a cycle the water will not drain and the machine simply stops. I've cleaned all the filters and adjusted the drainage pipe, but it is still blocked. Is there anything I can do without calling out an engineer?

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Re: Water will not drain.

This problem is often due to a blockage in the impeller blades which are located under the filter at the bottom of the dishwasher. Remove the filter and you should be able to get to the impeller by undoing a couple of torx screws. If the impeller has been blocked (this could be by something as small as a grain of uncooked rice), remove the obstruction so the impeller turns freely.

Posted on Jan 04, 2009

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Water remains in machine. Machine stops after a minute or so and diplays F11.

F11 means Drainage fault.

Water present in appliance and is not being drained off. The display shows Drain fault F11. The buzzer is activated for 2 minutes.

Background information:
After each drain pump step, the circulation pump operates for 2 seconds and heater pressure switch B1/13 checks the water level. If it is too high (large quantity of residual water remaining in the cabinet), the drainage time is extended. If, after a further check, the water level is still too high, then the program is interrupted, the fault code is saved and the drain pump is activated. Fault code F11 is also registered if heater relay 1K1 is not activated after the fault code F51 register check; see Section 080-3.18. Drain hose kinked. Remedy: Check the drain hose for correct positioning.

Cause: Drain blocked.
1. Clean the on-site drain.
2. Check the sump drain.
3. Check the filters.
4. Check the heater pressure switch and replace it if necessary.

Cause: Ball in non-return valve in sump has not opened (e.g., jammed).
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Clean the drain pump and its impeller.

Cause: Drain pump defective.
1. Check the voltage supply to the drain pump.
2. If correct voltage is present, check the drain pump motor winding.
3. Replace the drain pump, if necessary.

Cause: Foreign objects in heater pressure switch.
Check the heater pressure switch for blockages and correct switching point.

Cause: Heater relay defective. Heater relay (coil or contacts) becomes defective during the drainage step (after fault code F51 register check).
Replace the heater relay.

Hope this helps to solve it.

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