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Error code reference

Gaggenau Range Error Code F13

Fault of core temperature sensor / short circuit

Gaggenau codesGaggenau range codes

Fault of core temperature sensor / short circuit - bypass resistor open of electronics or short circuit core temperature sensor.

First step from the service manual

Check temperature sensor with the customer service test programme, check resistance value (25°C/77°F = approx. 50 kohm, 70°C/158°F = approx. 8.77 kohm), check cable and KFT socket, replace KTF temperature sensor (meat probe), if renewed fault replace power electronics.

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

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What F13 means on a Gaggenau range

The F13 error code on a Gaggenau range indicates a fault in the core temperature sensor circuit, also known as the KTF sensor or meat probe. The fault can take one of two forms: a short circuit in the core temperature sensor itself, or an open bypass resistor on the power electronics board. Both conditions disrupt the expected resistance signal that the control system reads to monitor the internal temperature of food being cooked. When the electronics cannot interpret a valid signal from this circuit, F13 is triggered to protect against inaccurate temperature readings during cooking.

The KTF core temperature sensor is an NTC (negative temperature coefficient) thermistor, meaning its resistance decreases predictably as temperature rises. The expected resistance values are approximately 50 kohm at 25°C (77°F) and approximately 8.77 kohm at 70°C (158°F). A short circuit in the sensor or its cable will pull resistance far below these expected values, while an open bypass resistor on the electronics board can produce an out-of-range reading from the board side of the circuit. Both faults register as F13 because the control system cannot distinguish a valid probe signal.

Diagnosis begins by running the customer service test programme and measuring the resistance of the KTF sensor at known temperatures. The cable harness and KFT socket should be inspected for damage, corrosion, or poor seating, as connection problems are a common contributor. If the sensor and wiring test within spec but the fault persists, the power electronics board contains the bypass resistor involved in this circuit and will need to be replaced.

Source: manufacturer service documentation.

Common causes of F13

  1. 01

    Faulty KTF core temperature sensor (meat probe)

    Part replacement

    The meat probe itself has developed an internal short circuit, causing its resistance to fall outside the expected range. Measuring the probe resistance at room temperature should read approximately 50 kohm at 25°C; a significantly lower or zero reading confirms a failed probe.

  2. 02

    Damaged or poorly seated probe cable or KFT socket

    Wiring / connection

    The cable connecting the KTF probe to the electronics can suffer from pinching, corrosion, or a loose connection at the KFT socket. Visually inspect the cable routing and firmly reseat the socket connector before condemning the probe or board.

  3. 03

    Open bypass resistor on the power electronics board

    Part replacement

    The power electronics board contains a bypass resistor that is part of the core temperature sensor circuit. If this resistor has opened, the board cannot complete the signal circuit correctly, triggering F13 even when the probe and cable are undamaged.

  4. 04

    Short circuit in the probe cable wiring

    Part replacement

    Physical damage to the probe cable insulation can cause conductors to short together, mimicking a shorted sensor. This will produce abnormally low resistance readings at the KFT socket even when the probe itself is disconnected.

See the test procedure for each cause

Frequently asked questions about F13

What does F13 mean on a Gaggenau range?
F13 indicates a fault in the core temperature sensor circuit, which involves the KTF meat probe. The code is triggered either by a short circuit in the sensor or its wiring, or by an open bypass resistor on the power electronics board. The oven cannot read a valid temperature signal from this circuit, so the fault is flagged to prevent inaccurate probe-based cooking.
Can I fix the F13 error myself?
Some steps are accessible to a confident DIYer. You can inspect the meat probe cable for visible damage and firmly reseat the KFT socket connector. Measuring the probe resistance with a multimeter and comparing it against the known spec values (approximately 50 kohm at 25°C and approximately 8.77 kohm at 70°C) can confirm whether the probe has failed. However, if the electronics board is involved, replacement of that component is best handled by a qualified technician.
Is it safe to use the range while F13 is displayed?
The F13 fault specifically affects the core temperature sensor used for probe-based cooking. Using the oven for standard bake or broil functions may still be possible, but any cooking mode that relies on the meat probe for temperature control should not be used while the fault is active. Continuing to use the probe function with a faulty sensor circuit could result in inaccurate internal food temperatures.
Will resetting the range clear the F13 error?
A power reset by switching off the range at the circuit breaker may temporarily clear the display, but the fault will return if the underlying hardware problem is not corrected. The F13 code is triggered by an out-of-range resistance reading in the sensor circuit, and that condition will persist until the defective component, whether the probe, cable, or electronics board, is repaired or replaced.
How much does it cost to repair a Gaggenau range F13 error?
Repair costs vary depending on which component has failed. A replacement KTF meat probe is typically the least expensive fix, while a new power electronics board represents a significantly higher parts cost. Including labor, total repair costs can range from around $150 to $600 or more depending on parts pricing and local service rates. Getting a diagnostic quote from a certified technician before authorizing repairs is advisable.

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