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Error code reference

Bosch Refrigerator Error Code E6170

Tray-heater error

Bosch codesBosch refrigerator codes

Tray-heater error

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What E6170 means on a Bosch refrigerator

The E6170 error code on a Bosch refrigerator indicates a tray heater fault. The tray heater is a low-wattage heating element typically located beneath the defrost water collection tray or drain pan. Its function is to evaporate condensation and defrost water that drains from the evaporator compartment, preventing overflow, ice buildup, and water leakage onto the floor. When the refrigerator's control board detects an abnormal condition in the tray heater circuit, it logs the E6170 fault.

The fault can be triggered by several conditions in the heater circuit: an open circuit caused by a burned-out heater element, a short circuit in the wiring harness, or a failed connection at the heater terminals. In some cases, excessive ice or debris accumulation around the tray heater can cause it to overheat and fail. The control board monitors the circuit continuously, and any deviation from expected electrical behavior will activate this error.

Diagnosing E6170 requires physical inspection of the tray heater element and its associated wiring. A technician should check for visible damage to the element, test continuity across the heater terminals, and inspect the wiring harness for chafing, burns, or loose connectors. If the heater element shows no continuity, it has failed and requires replacement. Wiring faults must also be traced back to the control board connector to rule out a board-level failure.

Source: manufacturer service documentation.

Common causes of E6170

  1. 01

    Failed tray heater element

    Part replacement

    The heating element itself has burned out or broken, resulting in an open circuit. This can be confirmed by testing continuity across the heater terminals with a multimeter.

  2. 02

    Damaged or broken wiring harness

    Part replacement

    The wires connecting the tray heater to the control board may be chafed, melted, or disconnected. Inspect the harness along its full length for visible damage or loose connectors.

  3. 03

    Corroded or loose heater terminals

    Wiring / connection

    Moisture near the drain tray can cause terminal corrosion over time, increasing resistance in the circuit and triggering the fault. Clean or replace the connector if corrosion is found.

  4. 04

    Ice or debris blocking the tray heater

    Wiring / connection

    Excessive ice accumulation around the heater element can cause it to overheat and fail, or can physically damage wiring. Inspect the drain tray area for ice buildup or foreign material.

  5. 05

    Faulty control board

    Part replacement

    If the heater element and wiring both test correctly, the control board may be misreading the circuit or failing to supply the correct voltage to the heater. This is the least common cause and should be evaluated last.

See the test procedure for each cause

Frequently asked questions about E6170

What does E6170 mean on a Bosch refrigerator?
E6170 indicates a tray heater error, meaning the refrigerator's control board has detected a fault in the circuit that powers the tray heater element. This element sits beneath the defrost drain tray and evaporates collected water. The fault may be caused by a failed heater, damaged wiring, or a control board issue. A technician will need to inspect and test the circuit to identify the root cause.
Can I fix the E6170 error on my Bosch refrigerator myself?
Some homeowners with electrical experience may be able to inspect the wiring harness and connectors for obvious damage or loose connections. However, testing the heater element for continuity and replacing components requires basic electrical tools and comfort working inside the appliance. If you are not confident working with appliance wiring, it is best to contact a qualified technician.
Is the E6170 error on a Bosch refrigerator a safety concern?
A failed tray heater generally does not pose an immediate safety risk, but it can lead to water pooling under the refrigerator over time, which may cause floor damage or create a slip hazard. Addressing the fault promptly prevents secondary damage. Do not ignore the error for extended periods.
How much does it cost to repair a Bosch refrigerator with an E6170 error?
Repair costs vary depending on whether the fault is in the heater element, the wiring, or the control board. Tray heater element replacements are typically among the lower-cost repairs, with parts and labor generally ranging from $100 to $250. Control board replacement is considerably more expensive, often ranging from $300 to $600 or more including labor.
Will resetting my Bosch refrigerator clear the E6170 error code?
A reset may temporarily clear the code from the display, but if the underlying fault in the tray heater circuit has not been repaired, the error will return. Resetting the appliance is not a fix and should only be used as a diagnostic step to observe whether the fault reappears. The root cause must be identified and corrected to permanently resolve the error.

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