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Error code reference

Miele Dishwasher Error Code F2

NTC sensor leads or temperature controls short-circuited.

Miele codesMiele dishwasher codes

NTC sensor leads or temperature controls short-circuited.

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What F2 means on a Miele dishwasher

The F2 error code on a Miele dishwasher indicates a short circuit condition in the NTC (Negative Temperature Coefficient) sensor circuit or the associated temperature control components. The NTC sensor is a thermistor responsible for monitoring wash water temperature throughout the cycle. When a short circuit occurs in this circuit, the resistance drops abnormally low rather than varying predictably with temperature, causing the control board to detect an out-of-range signal and trigger the F2 fault.

A short circuit in the NTC circuit can originate at several points: the sensor itself, the wiring harness connecting the sensor to the control board, or the terminal connections at either end. NTC thermistors that have failed internally can present a near-zero resistance reading regardless of water temperature. Damaged wiring insulation, pinched harness sections, or corroded terminals that bridge conductors can also produce the same short circuit condition the control board registers as F2.

Because this fault directly affects temperature regulation, the dishwasher will typically halt operation to prevent overheating the wash water or running cycles at incorrect temperatures. Diagnosing F2 requires inspecting the NTC sensor and its wiring for physical damage, measuring sensor resistance with a multimeter, and checking connector integrity at both the sensor and control board ends of the circuit.

Source: manufacturer service documentation.

Common causes of F2

  1. 01

    Failed NTC thermistor (short circuit)

    Part replacement

    The NTC sensor itself has failed internally, causing it to read near-zero resistance instead of varying with temperature. This is the most common source of the F2 fault and requires sensor replacement.

  2. 02

    Damaged or pinched wiring harness

    Part replacement

    The wiring between the NTC sensor and the control board may have worn insulation, a pinch point, or a break that allows conductors to contact each other and create a short. Inspect the full length of the harness for visible damage or chafing.

  3. 03

    Corroded or bridged connector terminals

    Wiring / connection

    Moisture intrusion into the sensor connector or control board connector can cause corrosion that bridges terminals, simulating a short circuit. Check all connectors in the NTC circuit for corrosion, debris, or moisture.

  4. 04

    Control board fault

    Part replacement

    In less common cases, the control board's temperature sensing input circuit may have failed, producing an erroneous short circuit reading even when the sensor and wiring are intact. This is typically diagnosed after ruling out the sensor and harness.

See the test procedure for each cause

Frequently asked questions about F2

What does F2 mean on a Miele dishwasher?
F2 on a Miele dishwasher indicates that the NTC temperature sensor leads or temperature control components have a short circuit condition. The control board detected abnormally low resistance in the sensor circuit, which prevents accurate water temperature monitoring. As a result, the dishwasher halts operation to avoid running a cycle with uncontrolled temperatures.
Can I fix the F2 error myself?
A knowledgeable DIYer can inspect the NTC sensor wiring harness for visible damage, check connector terminals for corrosion, and test the sensor resistance with a multimeter. If the sensor reads near-zero ohms regardless of temperature, it needs replacement. However, if the wiring and sensor test normal, the control board may be at fault, which typically requires a qualified technician to diagnose and replace.
Is it safe to keep using the dishwasher with an F2 error?
No. The F2 fault means the dishwasher cannot properly monitor water temperature, which is a core safety and performance function. Running the machine in this condition could result in overheated water or incomplete wash cycles. The dishwasher should remain out of service until the short circuit is identified and corrected.
Will resetting the dishwasher clear the F2 error?
A power reset may temporarily clear the fault display, but if the underlying short circuit in the NTC sensor circuit is still present, the F2 code will return as soon as the dishwasher attempts to read temperature. The root cause must be repaired for the error to clear permanently.
How much does it cost to repair a Miele dishwasher F2 error?
Repair costs depend on which component has failed. NTC sensor replacement is generally the least expensive fix, with parts and labor typically ranging from around $80 to $200. If the control board is at fault, costs can range from $200 to $500 or more depending on parts availability and labor rates in your area.

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