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Error code reference

Jenn-Air Dishwasher Error Code Sanitize LED + Clean LED

Thermistor failure detected during Field Service Test.

Jenn-Air codesJenn-Air dishwasher codes

Thermistor failure detected during Field Service Test.

First step from the service manual

Check thermistor resistance: 10K ohms ± 3% at 77°F, 2.4K ohms ± 6.5% at 140°F.

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

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What Sanitize LED + Clean LED means on a Jenn-Air dishwasher

The simultaneous illumination of the Sanitize LED and Clean LED on a Jenn-Air dishwasher signals a thermistor failure detected during the Field Service Test. The thermistor is a temperature-sensing resistor located in the wash tub that continuously monitors water temperature throughout the wash and sanitize cycles. The control board relies on accurate thermistor readings to regulate heating and confirm that water reaches the temperatures required for proper sanitization.

The thermistor operates on a negative temperature coefficient principle, meaning its resistance decreases as temperature rises. The specified resistance values are 10K ohms within plus or minus 3% at 77 degrees Fahrenheit, and 2.4K ohms within plus or minus 6.5% at 140 degrees Fahrenheit. A reading that falls outside these tolerance windows during the Field Service Test triggers this fault code, indicating the sensor is no longer providing reliable data to the control board.

Common causes include a failed thermistor, damaged wiring in the sensor circuit, or a poor connector connection between the thermistor harness and the control board. Because the sanitize function depends entirely on confirmed water temperature data, the dishwasher cannot verify cycle completion without an accurate sensor signal. Diagnosing this fault requires a multimeter to check resistance across the thermistor terminals and continuity checks along the associated wiring harness.

Source: manufacturer service documentation.

Common causes of Sanitize LED + Clean LED

  1. 01

    Failed thermistor

    Part replacement

    The thermistor itself may have drifted out of spec or failed completely, producing resistance readings outside the acceptable ranges of 10K ohms at 77°F or 2.4K ohms at 140°F. Confirm by measuring resistance across the thermistor terminals with a multimeter and comparing against the specified tolerances.

  2. 02

    Damaged thermistor wiring harness

    Part replacement

    Wires connecting the thermistor to the control board can crack, fray, or short due to heat exposure and repeated vibration. Inspect the full harness run for visible damage and use a multimeter to check for continuity breaks or shorts to ground.

  3. 03

    Loose or corroded connector

    Wiring / connection

    The connector between the thermistor harness and the control board may be loose, corroded, or improperly seated, causing intermittent or absent sensor signals. Disconnect, inspect, and firmly reseat the connector, checking the pins for corrosion or damage.

  4. 04

    Control board fault

    Part replacement

    If the thermistor and wiring both test within specification, the control board itself may be misreading the sensor input due to a failed input circuit. This is the least common cause and should only be considered after the sensor and wiring are confirmed good.

See the test procedure for each cause

Frequently asked questions about Sanitize LED + Clean LED

What does Sanitize LED + Clean LED mean on a Jenn-Air dishwasher?
This combination of illuminated LEDs indicates a thermistor failure detected during the Field Service Test. The thermistor is the temperature sensor inside the dishwasher tub that monitors water heat throughout each cycle. When its resistance readings fall outside the specified values, the control board logs this fault and displays the error via the Sanitize and Clean LEDs. The dishwasher cannot reliably complete a sanitize cycle until the thermistor circuit is repaired.
How do I fix the Sanitize LED + Clean LED error on my Jenn-Air dishwasher?
Start by measuring the thermistor resistance with a multimeter. At 77°F the reading should be 10K ohms within plus or minus 3%, and at 140°F it should be 2.4K ohms within plus or minus 6.5%. If the readings are out of range, replace the thermistor. If the thermistor tests correctly, inspect the wiring harness and connectors between the sensor and the control board for damage, corrosion, or loose connections.
Will resetting my Jenn-Air dishwasher clear the Sanitize LED + Clean LED error?
A power reset may temporarily clear the displayed fault, but the error will return if the underlying thermistor problem has not been corrected. Because this fault is detected during the Field Service Test, the control board will re-run the diagnostic and re-flag the failure if the thermistor resistance remains out of specification. A lasting fix requires repairing or replacing the faulty component.
Is it safe to run my Jenn-Air dishwasher with the Sanitize LED + Clean LED error active?
Basic wash functions may still operate, but the sanitize feature cannot be trusted to perform correctly without a functioning thermistor. The dishwasher cannot confirm that water is reaching the required sanitization temperature, so dishes will not be reliably sanitized. It is best to avoid using the sanitize cycle until the thermistor circuit has been inspected and repaired.
How much does it cost to repair the Sanitize LED + Clean LED error on a Jenn-Air dishwasher?
If only the thermistor needs replacement, parts costs are typically in the range of $15 to $50 depending on the specific model, with professional labor adding $75 to $200 or more depending on your location and the service provider. If the control board is determined to be at fault, costs rise significantly, often ranging from $150 to $400 or higher for the part alone. Getting a diagnostic estimate before authorizing repairs is always a practical step.

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