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Error code reference

Bosch Refrigerator Error Code Et

Level switch error

Bosch codesBosch refrigerator codes

Level switch error — no pulse sensed for some time; water supply controlled by time (supply mode skipped).

First step from the service manual

Verify level switch operation; terminates when normal condition restored.

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

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What Et means on a Bosch refrigerator

The Et error code on a Bosch refrigerator indicates a level switch error, specifically that the control system has not detected a pulse signal from the water level switch for an extended period. The level switch is a sensor responsible for monitoring the water supply entering the ice maker or water dispenser reservoir. When this switch fails to generate the expected pulse signals during a fill cycle, the refrigerator interprets this as a failure in the water supply sensing system and logs the Et code.

When the Et error is active, the refrigerator's control board responds by switching water supply operation from level-based control to a timed mode, effectively skipping the normal supply mode that relies on level switch feedback. This means the appliance can no longer accurately gauge how much water has entered the reservoir and instead estimates fill duration by time alone. This fallback behavior helps prevent overflow or underfill conditions during the period when the level switch signal is absent.

The most common causes of this error involve the level switch itself, its wiring, or the water supply conditions that allow the switch to function correctly. The error code self-clears once the level switch resumes normal operation and the control system detects restored pulse signals. Technicians should begin by inspecting the level switch for continuity, checking associated wiring harnesses for damage or loose connections, and confirming that adequate water pressure is reaching the inlet valve to allow proper fill cycles.

Source: manufacturer service documentation.

Common causes of Et

  1. 01

    Faulty level switch

    Part replacement

    The level switch itself may have failed mechanically or electrically and is no longer generating the pulse signals the control board expects. Testing the switch for proper continuity and signal output during a fill cycle will confirm this diagnosis.

  2. 02

    Wiring harness damage or loose connection

    Wiring / connection

    Corroded, pinched, or disconnected wiring between the level switch and the control board can interrupt pulse transmission. Inspect the harness connectors at both ends for signs of corrosion, looseness, or physical damage.

  3. 03

    Insufficient water pressure or supply issue

    Wiring / connection

    Low household water pressure or a partially closed supply valve can prevent the fill cycle from proceeding normally, which may cause the level switch to never trigger. Check that the water supply line valve is fully open and that pressure meets the refrigerator's requirements.

  4. 04

    Clogged or frozen water inlet valve

    Part replacement

    A water inlet valve that is blocked by mineral deposits or frozen due to improper installation near a cold zone may restrict water flow enough to prevent the level switch from sensing a fill. Inspect the valve for blockage and verify it opens fully when energized.

  5. 05

    Control board communication fault

    Part replacement

    In some cases, the main control board may fail to correctly read the level switch signal even when the switch itself is functioning. This is less common but should be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about Et

What does Et mean on a Bosch refrigerator?
The Et code on a Bosch refrigerator indicates a level switch error, meaning the control board has not received a pulse signal from the water level switch for a period of time. When this happens, the refrigerator switches from level-based water supply control to a timed fill mode and skips the normal supply mode. The error resolves automatically once the level switch resumes normal operation and pulse signals are detected again.
How do I fix the Et error on my Bosch refrigerator?
Start by checking the level switch for proper operation, including continuity and signal output during a fill cycle. Inspect the wiring harness between the level switch and control board for loose connections, corrosion, or damage. Also confirm that your water supply line is fully open and that water pressure is adequate. If the switch itself has failed, it will need to be replaced to clear the error permanently.
Will resetting my Bosch refrigerator clear the Et error code?
A power reset may temporarily clear the Et code from the display, but the error will return if the underlying level switch issue has not been resolved. The code is designed to self-terminate once the control board detects that the level switch has resumed normal pulse operation. Resetting without fixing the root cause will result in the refrigerator continuing to operate in timed fill mode rather than accurate level-based control.
Is it safe to keep using my Bosch refrigerator while the Et error is showing?
The refrigerator does implement a fallback timed water supply mode when the Et error is active, so basic operation continues. However, ice production and water dispensing may be unreliable since the appliance is no longer measuring water levels accurately. It is advisable to have the level switch inspected and repaired promptly to restore proper water supply control and prevent potential overfill or underfill issues.
How much does it cost to repair a Bosch refrigerator showing an Et error?
Repair costs vary depending on the root cause. If the fix involves only reseating a loose wiring connection or fully opening the water supply valve, there may be no parts cost at all. Replacing a faulty level switch typically runs between $50 and $150 for the part, with additional labor costs if a technician is hired. A water inlet valve replacement can range from $30 to $100 or more depending on the specific model.

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