mypros+
Error code reference

Bosch Refrigerator Error Code Er Eu

On/Off switch on ice maker does not close over a long period; ice making is interrupted.

Bosch codesBosch refrigerator codes

On/Off switch on ice maker does not close over a long period; ice making is interrupted.

First step from the service manual

Check On/Off switch on the ice maker.

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

MyPros+ Max

Get the full diagnostic procedure for Er Eu.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What Er Eu means on a Bosch refrigerator

The Er Eu error code on a Bosch refrigerator indicates that the On/Off switch on the ice maker has failed to close for an extended period, causing the ice-making cycle to be interrupted. This switch is a critical control component within the ice maker assembly. When the control board polls the switch and receives no closed-circuit signal over a defined monitoring window, it logs the Er Eu fault and halts ice production to prevent erroneous operation.

The On/Off switch functions as a user-accessible toggle that signals the ice maker control circuit to begin or suspend operation. If the switch contacts become worn, corroded, or mechanically stuck in the open position, the refrigerator's control system interprets this as an indefinite off-command and suspends the ice-making process. In some cases, wiring between the switch and the control board can develop loose connections or breaks that mimic an open switch condition, even when the physical toggle appears to be in the correct position.

Diagnosis should begin with a direct inspection of the On/Off switch on the ice maker, checking for visible damage, debris interference, or a switch that is physically in the off position. If the switch appears correctly positioned, the next step is to test continuity across the switch contacts using a multimeter. A properly functioning closed switch should show near-zero resistance. If the switch tests open when it should be closed, or if continuity cannot be established through the wiring harness leading to it, replacement of the switch or the associated wiring is indicated.

Source: manufacturer service documentation.

Common causes of Er Eu

  1. 01

    Switch physically in the Off position

    Wiring / connection

    The On/Off switch on the ice maker may have been accidentally toggled to the off position. Verify the switch is set to the on position before any further diagnosis.

  2. 02

    Faulty or worn On/Off switch contacts

    Part replacement

    Over time, the internal contacts of the switch can wear out or corrode, preventing the circuit from closing even when the toggle is in the on position. Testing with a multimeter for continuity across the switch terminals will confirm this failure.

  3. 03

    Loose or damaged wiring harness

    Wiring / connection

    A loose connector or broken wire in the harness between the On/Off switch and the ice maker control board can create an open circuit that the system reads as a switch that will not close. Inspect all connectors and wiring for damage or poor seating.

  4. 04

    Ice or debris obstructing the switch mechanism

    Wiring / connection

    Ice buildup or debris around the switch can physically prevent the toggle from moving into the closed position. Inspect the area around the switch for any obstruction and clear it before retesting.

  5. 05

    Ice maker control board fault

    Part replacement

    If the switch and wiring both test correctly but the error persists, the control board within the ice maker assembly may be failing to read the switch signal properly. This is a less common cause and typically diagnosed after all other components are ruled out.

See the test procedure for each cause

Frequently asked questions about Er Eu

What does Er Eu mean on a Bosch refrigerator?
Er Eu on a Bosch refrigerator means the ice maker's On/Off switch has not registered a closed position for an extended period, causing ice production to stop. The refrigerator's control system monitors this switch and triggers the fault when it detects the switch is remaining open longer than expected. This code points directly to the ice maker switch, its wiring, or less commonly the ice maker control board.
How do I fix the Er Eu error on my Bosch refrigerator?
Start by checking that the On/Off switch on the ice maker is physically set to the on position, as it may have been accidentally toggled. If the switch is already in the on position, test it for continuity with a multimeter. A switch showing an open circuit when toggled on will need to be replaced. Also inspect the wiring harness connected to the switch for loose or damaged connections.
Is the Er Eu error on a Bosch refrigerator a safety concern?
The Er Eu error does not represent a safety hazard. It only affects ice production and does not impact the refrigerator or freezer cooling functions. Your food will remain safe while this error is present, but the ice maker will not produce ice until the fault is resolved.
Will resetting my Bosch refrigerator clear the Er Eu error code?
A reset may temporarily clear the Er Eu code from the display, but the error will return if the underlying issue with the On/Off switch or its wiring has not been corrected. Addressing the root cause, such as replacing a failed switch or reseating a loose connector, is necessary for the error to clear permanently.
How much does it cost to repair an Er Eu error on a Bosch refrigerator?
Repair costs vary depending on what component has failed. If the fix is as simple as repositioning the switch or reseating a connector, there may be no parts cost involved. Replacing the On/Off switch itself is generally an inexpensive repair, with parts typically ranging from $10 to $40 and professional labor adding $75 to $150 or more depending on your area. If the ice maker control board requires replacement, total costs including parts and labor could range from $150 to $350 or higher.

Related Bosch refrigerator codes

All Bosch refrigerator codes
View all 209 Bosch refrigerator codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass