Is your Bosch Dishwasher Saying Check Water? Here is what you have to do!

Bosch dishwashers have self-diagnostic settings. If your dishwasher displays a check water error, it could have multiple reasons. The possible reasons for water check error on your Bosch dishwasher are:

  • Blocked drain pipe
  • Tap is turned off
  • Blocked filters
  • Bent water inlet hose
  • Clogged water inlet filter
  • Water pump blockage

Check Water Error Codes

The best thing about any Bosch dishwasher is its self-diagnostic feature. In case of any error, the dishwasher will show error codes. It can also indicate errors through flashing lights. And sometimes, the dishwasher displays both lights and error codes.

check water light

If your dishwasher stops during a washing cycle and shows check water error, it could have multiple reasons. The possible water check error codes on a Bosch dishwasher are given below.

Error code E3: Check water warning along with error code E3 indicates that there isn’t enough water in the dishwasher. It could happen due to the blockage in the water inlet valve. Food debris and residues in the water inlet valve cause a hindrance to the water supply.

Solution: To remove this error, you should clean up the water inlet valve or replace it if needed. Follow the given steps to clean your dishwasher’s water inlet valve.

  • Turn off the power and water supply.
  • Remove the screws present on the water inlet valve. You can use a screwdriver to remove them.
  • Loosen the inlet hose of the dishwasher.
  • Pull out the hose from the inlet valve.
  • Use a screwdriver to take off the inlet valve screen.
  • Clean the hose and inlet valve with water.
  • Reassemble the hose and inlet valve to their previous position.
  • Turn on the dishwasher, and the check water error will probably vanish.

Error code E4: If error code E4, along with the check water light appears, it means the water switch is faulty. The water switch monitors the amount of cold and hot water in your dishwasher. It also ensures that your machine doesn’t fill up with excessive water.

Solution: Instead of repairing the water switch, you should replace it with a new one. Either call a professional or change it by yourself. Follow the given method to replace the water switch.

  • Switch off your dishwasher and unplug it.
  • Remove the torx screws from the door’s inner panel with a screwdriver.
  • Separate the outer and inner door panels by removing the screws. Hold the outer door panel tightly to keep it safe from falling.
  • Reach to the control panel and disconnect the user interference wire.
  • Remove the bottom access panel and toe panel with a screwdriver.
  • In water switch socket/housing, release the left tab and open the left cover.
  • Now, remove the harness wire from the housing connector.
  • Just like the left tab and cover, remove and release the right ones.
  • Remove the water or float switch and replace it with the new one.
  • Reassemble the removing covers, wires, and door panels.
  • Plug-in the dishwasher and continue the dishwashing process.

Error code E5: Sometimes, water check light flashes along with code E5. This indicates that the dishwasher is overfilled with water. It happens due to the fault in the water switch and the water inlet valve.

Solution: After accessing the damage, you should repair or replace the floating switch and the water inlet valve with the above-mentioned processes. (Error code E3 and Error Code E4)

Error code E6: The water check light flashing along with error code E6 indicates a faulty aqua sensor. The purpose of the aqua sensor is to check whether the water is dirty or clean.

Solution: After the indication of this error code, replace the aqua sensor of the dishwasher.

  • Unplug the dishwasher and remove the drain hose from behind the dishwasher.
  • Remove the socket placed at the back of the dishwasher and disconnect the two wires that you will see there.
  • There will be an aqua sensor behind the socket. A connector is also attached to the socket.
  • Use a screwdriver to disconnect the sensor from the connector.
  • Now, remove the faulty aqua sensor and replace it with a new one.
  • Resemble the connector, sensor, socket, and drain hose.

Error code E9: When the anti-flood switch (controls the amount of water enters into the dishwasher) is activated, the water check light and rinse aid light appear on the Bosch dishwasher. You can also see the error code E9 appear alongside these lights. It indicates the blocked or faulty drain and water pump.

You can also read a fixing guide for error code E09.

Solution: Check the water leakage and resolve the issue by replacing the faulty drain and water pump by following the method.

  • Remove the lower access panel with a screwdriver.
  • Similarly, remove the outer door panel and set it aside.
  • Remove the inner plate and disconnect it from the frame. Keep it aside.
  • Now move the sound damping pad a little to release the fill hose.
  • Pull out the fill hose from the air pressure chamber.
  • Disconnect the wire harness from the drain pump.
  • Remove the locking tab and move the drain pump in a clockwise direction.
  • After removing the older pump, replace it with the new one.

Drain pump

  • Fit the new pump by rotating it anti-clockwise.
  • Align the locking tab and harness wire to the new pump.
  • Insert it into the pressure chamber and reassemble the inner plate, door, and lower access panels.

Error code E22: Check water light along with error code E22 indicates residual water present in the sump (controls the water flow into the drain pump). This error could be due to a dirty filter or a blocked pump.

Solution: You can unclog the water pump by removing it through the process mentioned above. Use a scrub brush to remove the residues present in it. Similarly, you can also access and clear the water filter. To reach and clear the water filter, follow the given steps.

  • Switch off the dishwasher and unplug it.
  • Remove the bottom part or rack of the dishwasher.
  • Locate the filter and clean its surrounding space with a clean cloth.
  • Remove the upper lift to pull water filter out from its place.

Dirty water filter

  • Rinse the filter with hot water and use a scrub brush to remove debris.
  • Gently clean it with a soft and clean cloth.
  • Place the water filter back and plug in the dishwasher.

Clean filter

A general method to fix dishwasher’s water check error

Check water error light shows the fault in dishwasher’s functioning due to water-related problems. It could be due to the disruption in the dishwasher’s cycle. If only the water check light is flashing without any error code, you can fix it through a simple method.

  • Turn off the dishwasher and wait for a few minutes.
  • Pull the dishwasher out from its place.
  • Now, gently tilt the dishwasher at a 45-degree angle to the left side. Repeat this step for the right side also.
  • Water will spill out. Handle the dishwasher with care, especially if it is filled with water.
  • After the spilling of water, clear the space.
  • Put the dishwasher back to its previous place.
  • Turn on the device and continue your washing.

Frequently Asked Questions

1. Why is your dishwasher saying check water?

The possible reasons for water check error on dishwasher could be the clogged inlet valve and clogged drain hose. Other than this, there could be a software error also. So, check for the software error first and then go for other options.

2. What does Bosch dishwasher check water and rinse aid light flashing indicates?

Rinse aid and check water flashlight together indicates the activation of the dishwasher’s anti-flood switch. This happens due to a blocked drain pump. Moreover, it can be accompanied by error code E9. Replace or repair the drain pump to fix this water issue.

3. How to reset the check water on a Bosch dishwasher?

For a modern dishwasher, you have to press and hold the start button for almost 3-5 seconds. For older Bosch models, you have to press the cancel or drain button for a few seconds to reset the check water.


  • Stephen Powers

    Appliance repair guy from Washington. I am majorly experienced in dishwashers, water filters and refrigerators, AMA on my twitter account.

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