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Error code reference

Thermador Refrigerator Error Code E07

Freezer evaporator sensor failure

Thermador codesThermador refrigerator codes

Freezer evaporator sensor failure — no failure message during normal operation; displayed only after auto diagnostic test if evaporator sensor fails.

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  • 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
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What E07 means on a Thermador refrigerator

The E07 error code on a Thermador refrigerator indicates a freezer evaporator sensor failure. This code is unique in that it does not appear during normal operation of the refrigerator. Instead, it is only displayed when the unit's built-in auto diagnostic test is run and the evaporator temperature sensor fails to respond correctly during that test cycle. The evaporator sensor is a thermistor, a resistive temperature-sensing component mounted near or on the evaporator coil in the freezer compartment. Its job is to relay accurate temperature data to the control board so the system can manage defrost cycles and compressor operation properly.

When the auto diagnostic test runs, the control board checks the signal from the freezer evaporator sensor against expected resistance or voltage values for a given temperature range. If the sensor returns a reading that is out of range, open-circuit, or short-circuit, the board logs and displays E07. Common failure modes include a sensor that has drifted out of calibration, a broken or corroded connector at the sensor harness, damaged wiring along the sensor circuit, or a fully failed thermistor element. Ice buildup around the evaporator coil can also put mechanical stress on the sensor and its wiring, contributing to intermittent or permanent failures.

Because this code only appears during diagnostics, a technician may need to manually initiate the auto diagnostic test to reproduce and confirm the fault. Verifying the sensor's resistance reading at the harness connector, and comparing it against the expected value for the current freezer temperature, is the most direct way to confirm whether the sensor itself has failed or whether the problem is in the wiring or connector between the sensor and the control board.

Source: manufacturer service documentation.

Common causes of E07

  1. 01

    Failed evaporator thermistor

    Part replacement

    The thermistor element itself may have failed, producing an open-circuit or short-circuit reading. This is the most common cause and can be confirmed by measuring the sensor's resistance at the harness connector and comparing it to the expected value for the current freezer temperature.

  2. 02

    Damaged or corroded wiring harness connector

    Wiring / connection

    Moisture and ice in the freezer compartment can corrode the connector pins between the sensor and the control board wiring harness, causing intermittent or total signal loss. Inspect the connector for visible corrosion, bent pins, or loose contact.

  3. 03

    Broken sensor wiring

    Wiring / connection

    The wiring between the evaporator sensor and the control board can crack or break, particularly at points where it bends around freezer components or is routed near moving parts. A continuity check along the full length of the circuit will identify any break.

  4. 04

    Ice buildup around the evaporator sensor

    Wiring / connection

    Excessive frost accumulation on the evaporator coil can physically stress the sensor and its wiring, leading to damage or a degraded connection. Running a manual defrost cycle and inspecting the sensor afterward can reveal whether ice was the contributing factor.

  5. 05

    Control board fault

    Part replacement

    In less common cases, the main control board may misread or fail to properly process the sensor signal even when the sensor and wiring are intact. This is typically diagnosed only after the sensor and wiring have been confirmed good.

See the test procedure for each cause

Frequently asked questions about E07

What does E07 mean on a Thermador refrigerator?
E07 indicates that the freezer evaporator sensor has failed the unit's auto diagnostic test. The evaporator sensor is a thermistor that monitors temperature near the freezer's cooling coil and helps the refrigerator manage defrost cycles. This code does not appear during normal refrigerator operation; it is only shown after the auto diagnostic test is run and the sensor produces an out-of-range, open, or short reading. A technician will need to inspect the sensor, its wiring, and the harness connector to pinpoint the failure.
Can I fix the E07 error code myself?
Some portions of the diagnosis can be handled by a knowledgeable DIYer, such as inspecting the wiring harness connector for corrosion or loose pins and checking for excessive frost buildup around the evaporator coil. However, accurately testing the thermistor requires a multimeter and knowledge of the expected resistance values for the sensor at specific temperatures. Replacing the evaporator sensor also requires accessing the freezer's evaporator compartment, which typically involves removing interior panels. If you are not comfortable with electrical testing or disassembly, a professional service call is recommended.
Will resetting the refrigerator clear the E07 error?
Because E07 only appears after the auto diagnostic test is run, a power reset may clear the displayed code temporarily. However, if the underlying sensor or wiring fault is still present, the code will return the next time the diagnostic test is performed. Clearing the code without addressing the root cause means the refrigerator may not accurately monitor freezer temperatures or manage defrost cycles, which can affect food preservation over time.
Is it safe to keep using my refrigerator with an E07 code?
The E07 code appears only during diagnostics and not as an active alert during normal operation, so the refrigerator may continue running. However, a failed evaporator sensor can impair the refrigerator's ability to regulate defrost cycles correctly, which over time can lead to frost buildup, reduced cooling efficiency, or compressor strain. It is advisable to have the sensor inspected and repaired promptly rather than continuing to operate the unit with a known sensor fault.
How much does it cost to repair an E07 error on a Thermador refrigerator?
Repair costs depend on the specific cause of the fault. If only the evaporator thermistor needs to be replaced, parts costs are generally in the range of $20 to $80 for the sensor itself, with labor adding $100 to $250 depending on your location and service provider. If the issue is traced to a damaged wiring harness or a faulty control board, costs can increase significantly. Getting a diagnostic estimate from a qualified technician before authorizing repairs is the best way to understand the total cost for your specific situation.

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