Bosch Refrigerator E3 Error Code: Sensor Causes, Reset, and Fixes

On the Bosch refrigerator setup covered here, E3 concerns the ice maker temperature sensor circuit. Stopped ice production does not establish whether the sensor has failed or its connection is interrupted. This guide explains the reset and circuit checks, including comparing resistance with the correct model chart, before deciding which component needs replacement.

Quick Facts

What Does the Bosch Refrigerator E3 Error Code Mean?

The Bosch refrigerator E3 error code concerns the ice maker temperature sensor on the covered setup; a sensor reading must be compared with the correct model chart.

Keep these points in mind.

• Temperature sensor in the ice maker or freezer circuit reading out of range
• The main board displays E3
• Ice production and freezer temperature may suffer

A symptom points toward a system, but several parts in that system may cause it; the useful question is which observation separates those parts. Visible damage gives stronger evidence than a guess from age alone. An electrical fault needs a reading made at the right points.

What Causes a Bosch Refrigerator to Show E3?

The same resistance can mean different things at different temperatures; a sensor test made at the board also includes the wires between the board and sensor. That is useful, but it means a bad reading can come from either the sensor or the harness.

The following details help narrow the decision.

A symptom points toward a system, but several parts in that system may cause it; the useful question is which observation separates those parts. Visible damage gives stronger evidence than a guess from age alone. An electrical fault needs a reading made at the right points.

What would make this part a poor choice? A sound test result means you need to consider the other causes before ordering it.

How Do You Reset the E3 Error Code on a Bosch Refrigerator?

Follow these steps to check this part of the fault.

Check the Reset and Response

1. Disconnect power or trip the breaker for 5 minutes.
2. Restore power.
3. Hold the alarm or lock button if the model’s manual lists it.
4. Watch for the code to return.

A reset can clear a temporary control state; it cannot remove a physical blockage or repair a broken wire. What happens after the reset matters more than a for a moment normal display. A returning fault suggests that the control is detecting the same condition again.

How to Test and Replace the Sensor on a Bosch Refrigerator Step by Step

Follow these steps to complete the covered procedure for Bosch refrigerator E3 error code.

Phase 1: Unplug the Fridge, Remove the Rear Control Board Cover, and Disconnect CN12

1. Disconnect power.
2. Remove the rear control board cover.
3. Disconnect CN12.

Phase 2: Measure Resistance Across Pins 6 and 7 on the kΩ Scale and Compare to the Chart

1. Set the meter to kilohms.
2. Measure pins 6 and 7 where the model diagram identifies the ice maker sensor.
3. Compare the result with the chart for that model and sensor temperature.

Phase 3: Replace the Faulty Sensor

1. Disconnect power and water.
2. Remove the sensor covers and mounting screws.
3. Note the sensor direction.
4. Inspect the freezer walls and ceiling.
5. Fit the new sensor firmly in the same direction.
6. Reconnect its harness.
7. Refit covers.
8. Restore water and power and check ice production.

Phase 4: Check Wiring, Connector Pins, Continuity, and Ground If E3 Persists

1. Disconnect power if E3 persists.
2. Check the sensor wires from end to end.
3. Inspect connector pins and loose terminals.
4. Check continuity between sensor and board.
5. Check the ground connections.

What Should the Bosch Sensor Readings Be?

Use the stated test condition as well as the reading; a normal value at the wrong temperature or terminals can lead to the wrong conclusion.

The following details help narrow the decision.

Resistance is measured in ohms with the part disconnected from power; a kilohm is 1,000 ohms. Continuity means there is an electrical path through the tested part. OL usually means that path is open or beyond the meter range.

What Other Bosch Refrigerator Error Codes Should You Know?

These signs need to be read together; a single symptom can point to more than one cause, so the condition of the related parts matters too.

The following details help narrow the decision.

Codes identify a circuit or condition that needs attention; they do not prove which part must be ordered. Similar-looking codes can mean different things across model generations. The spacing and order of the letters and digits also matter.

Should You Replace the Sensor, the Control Board, or Call a Technician?

Choose the repair that matches the confirmed fault; a cheaper part will not help if it belongs to a different part of the system.

Keep these points in mind.

• Sensor $20 to $50
• Board $200 to $400
• Technician for live wiring faults
• Under-warranty units
• Or a fridge over 12 years old

FAQ

Does E3 Point to a Sensor or Control Board Fault on a Bosch Fridge?

E3 points first to the sensor circuit on this setup. The board becomes a suspect after the sensor and wiring pass.

When Should You Call a Technician for a Bosch E3 Error?

Call if you lack the correct sensor chart or cannot reach the wiring safely. A code that returns after a sound replacement also needs further diagnosis.

Will the Ice Maker Run With E3 Displayed?

Ice production may stop or behave poorly without a valid sensor signal. Do not use the code alone to predict whether a harvest will occur.

Does a Power Outage Cause E3?

A power event can leave a temporary code. A returning E3 still needs sensor and wiring checks.

Clearing E3 for Good

You have a clearer path when the symptoms, model, and test results agree; focus on the failed part and keep the nearby wiring, mounts, and seals in view. A sound diagnosis helps the repair solve the original problem.

Check the full model number, then choose the compatible ice maker temperature sensor so the E3 code stays cleared.