mypros+
Error code reference

Bosch Refrigerator Error Code E00

TCD (freezer compartment) temperature sensor reading out of range (≥60°C or ≤-55°C), indicating sensor break…

Bosch codesBosch refrigerator codes

TCD (freezer compartment) temperature sensor reading out of range (≥60°C or ≤-55°C), indicating sensor break, short-circuit, or no contact.

First step from the service manual

Check freezer compartment sensor for break/short-circuit/no contact.

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 E00.

  • 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 E00 means on a Bosch refrigerator

The E00 error code on a Bosch refrigerator indicates that the TCD sensor, which monitors temperature inside the freezer compartment, is returning a reading outside its valid operating range. Specifically, the control board flags E00 when the sensor signal corresponds to a temperature at or above 60°C or at or below -55°C. Because these readings fall outside any physically plausible operating condition for a freezer, the board interprets them as a fault condition rather than an actual temperature state.

The TCD sensor is a thermistor, meaning its electrical resistance changes predictably with temperature. When the sensor is functioning correctly, the resistance falls within a defined range that the control board uses to calculate freezer temperature. A broken sensor wire or a failed thermistor element will cause the circuit to read as open, driving the calculated temperature to an extreme high value. A short circuit in the sensor wiring or at the connector will drive resistance toward zero, pushing the reading to an extreme low value. Either condition triggers E00.

The most common physical causes include a corroded or disconnected wiring connector at the sensor or at the control board, physical damage to the sensor harness from ice buildup or mechanical contact, and outright thermistor failure due to age or moisture intrusion. Diagnosing the fault requires checking for continuity through the sensor circuit, inspecting connectors for corrosion or looseness, and measuring sensor resistance to confirm whether the thermistor itself is within specification.

Source: manufacturer service documentation.

Common causes of E00

  1. 01

    Disconnected or loose sensor connector

    Wiring / connection

    The wiring connector at the TCD sensor or at the control board may have worked loose or pulled free entirely. Inspect both ends of the sensor harness for secure seating and listen for an audible click when reseating connectors.

  2. 02

    Corroded sensor connector pins

    Wiring / connection

    Moisture inside the freezer compartment can cause corrosion on the sensor connector pins, increasing resistance to the point where the control board reads the circuit as open. Look for green or white oxidation on the connector terminals.

  3. 03

    Failed TCD thermistor

    Part replacement

    The thermistor element inside the sensor can fail due to age, moisture intrusion, or thermal cycling stress, causing it to read open or short. Measuring resistance across the sensor terminals will confirm whether it has failed.

  4. 04

    Damaged sensor wiring harness

    Part replacement

    The wire harness running to the freezer sensor can be pinched, cut, or damaged by ice accumulation pressing against it. Visually trace the harness from the sensor to the board and check for any visible breaks or abrasion.

  5. 05

    Control board fault

    Part replacement

    In less common cases, the control board itself may fail to correctly process a valid sensor signal, generating a false E00 code. This should be considered only after the sensor and its wiring have been confirmed to be in good condition.

See the test procedure for each cause

Frequently asked questions about E00

What does E00 mean on a Bosch refrigerator?
E00 means the TCD freezer compartment temperature sensor is reporting a value outside its valid range, specifically at or above 60°C or at or below -55°C. The control board treats these extreme readings as a sensor fault rather than a real temperature. The cause is typically a broken sensor wire, a short circuit in the sensor circuit, or a loose or corroded connector. The refrigerator cannot accurately monitor freezer temperature while this fault is active.
Can I fix a Bosch E00 error code myself?
Some E00 causes are within reach of a confident DIYer. You can start by unplugging the refrigerator, locating the freezer temperature sensor, and carefully checking that its wiring connector is fully seated and free of corrosion. If the connector is secure and clean but the error persists, testing the sensor's resistance with a multimeter will tell you whether the thermistor itself needs replacement. Control board issues are more complex and generally call for a technician.
Is it safe to keep using my refrigerator while E00 is displayed?
With a failed freezer sensor, the control board cannot accurately regulate freezer temperature, which means food safety is at risk. Your freezer may run warmer or colder than intended without reliable feedback. It is best to address the fault promptly rather than continuing to store perishables while the error is active.
How much does it cost to repair a Bosch E00 error code?
Repair cost depends on which component has failed. If only a connector needs reseating or cleaning, there may be no parts cost and just a service call fee, typically in the range of $75 to $150. Replacing the TCD thermistor sensor usually adds $20 to $80 in parts. If the control board is at fault, parts and labor combined can range from $200 to $400 or more depending on your location and the specific model.
Will resetting the refrigerator clear the E00 error code?
A power reset by unplugging the refrigerator for a few minutes may temporarily clear the displayed code, but if the underlying sensor fault is still present, E00 will return once the control board runs its diagnostics again. A reset is useful as a first step to rule out a temporary glitch, but a persistent E00 after reset indicates a real hardware fault that needs to be diagnosed and repaired.

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