Bosch Dishwasher E92 Error Code: Causes and Fixes

The E92 error on your Bosch dishwasher points at a water-level sensor or float-switch fault, though it can also indicate a communication issue between the control board and sensors depending on which variant you see (E92, -10 E92, or “WaterTop -40”). Filter and float check covers most of it.

What the E92 error means

Bosch uses E92 as a sensor-related fault code, but different displays attach different sub-codes that point at slightly different areas. Plain E92 most often correlates with a filter blockage similar to E22. The variant -10 E92 typically means a communication fault between the control board and a sensor. “WaterTop -40” combined with E92 on 800-series models points specifically at the float switch or water level sensor. The diagnostic path always starts with the filter and float because they’re the cheap fixes.

Common causes

• Blocked filter restricting water and confusing the level sensor (most common)
• Float switch held up by debris in the float chamber
• Loose wiring between sensor and main control board
• Door latch issue triggering a sensor mismatch (on some -10 E92 cases)
• Failed water level sensor

How to fix the E92 error

1. Reset the dishwasher. Unplug at the wall for five minutes, or cut power at the breaker for ten minutes if unplugging isn’t easy. Restore power and run a regular cycle.
2. Clean the filter. Remove the bottom rack, twist out the circular filter at the base of the tub, rinse under warm water with a soft brush, and refit hand-tight. Many E92 cases clear here.
3. Check the float. Look on the floor of the tub for the small plastic float. It should sit flat and lift freely. Wipe away any detergent residue or food debris holding it up.
4. Check the water supply. Confirm the supply valve is fully open and the inlet hose isn’t kinked. Sensor faults sometimes mask supply problems.
5. If E92 returns with -10 prefix or WaterTop variant, the diagnostic shifts to the sensor or control board. That’s a technician job — call out a Bosch-trained engineer rather than chase wiring yourself.

FAQ

Why does my Bosch show -10 before E92?
The leading number is a sub-code that narrows the fault. -10 E92 typically points at a communication fault between the control board and one of its sensors, or a door latch state mismatch.

Is E92 the same as E22?
They overlap. Both can be caused by filter blockage. Plain E92 is often resolved with a filter clean — same as E22 — but E92 has additional variants that point further into the electronics.

Can I run the dishwasher with E92 showing?
No — the cycle won’t complete because the sensor reading is preventing safe operation. Clear the easy causes first and run a test cycle to confirm.