JennAir Flush-Mount Code E:28: AquaSensor not working

What E:28 means

On the JennAir flush-mount dishwasher for European cabinets, for example the JDB9600AW, E:28 relates to the AquaSensor, the sensor that judges how dirty the wash water is. The machine continues to operate without the sensor. Either the appliance has no AquaSensor, or the sensor's calibration did not succeed. The listed checks are its wiring and whether the sensor is dirty. It shows in the service program only.

Common causes of E:28

AquaSensor dirty so the calibration cannot succeed
Wire or connector to the AquaSensor damaged
Appliance does not have an AquaSensor at all
AquaSensor itself failed

✓ One safe check you can try

1. Check the water supply is open. 2. Clean the filter and wipe the tub floor you can see. 3. Run one full normal program so the machine can try to recalibrate. 4. If the cycle runs normally and no message returns, nothing more is needed. If E:28 keeps coming back, call us.

! Why to stop there

The sensor sits in the water path and its wire runs under panels.
Calibration problems can come from a dirty sensor, so cleaning inside the pump area is a technician task.
With the sensor off, the machine uses fixed water amounts, which can use more water.
We check the wiring and sensor, and quote before replacing anything.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

→Same appliance

Other Dishwasher codes

F8E4JennAir Dishwasher Code F8E4: Check for water and leaks after installation F8E5JennAir Dishwasher Code F8E5: Fill valve stuck open F9E1JennAir Dishwasher Code F9E1: Long drain time F9E2JennAir Dishwasher Code F9E2: Drain motor error FAE4 or F10E4JennAir Dishwasher Code FAE4 or F10E4: Diverter valve error FAE5 or F10E5JennAir Dishwasher Code FAE5 or F10E5: Diverter leak H2OJennAir Dishwasher Code H2O: Not detecting water Sanitize Light FlashingJennAir Dishwasher Message "Sanitize Light Flashing": Sanitize Temperature Not Met

E:28E:28 questions

Can I keep using the dishwasher with E:28?

Yes, in many cases. The machine runs without the AquaSensor, so it washes with standard amounts. You may notice it uses more water or time than before.

Why would a machine report this if it has no sensor?

The listing covers a unit without an AquaSensor as one of the reasons. We confirm whether yours has one before we look at wiring or calibration.

Will cleaning fix it?

If the sensor is only dirty, a thorough clean and a full program can let it recalibrate. If not, we test the wiring, give you a price in writing and cover the repair for 30 days.