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Error code reference

Kenmore Dishwasher Error Code HE

Heater error

Kenmore codesKenmore dishwasher codes

Heater error - water is not heated or tub temperature is overheated above 194°F.

First step from the service manual

Check wiring connection and verify inlet water temperature; check thermistor and heater resistance.

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

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What HE means on a Kenmore dishwasher

The HE error code on a Kenmore dishwasher indicates a heater fault, meaning the control board has detected that the water temperature is either failing to rise during a heated wash or rinse cycle, or has exceeded the safe upper threshold of 194°F. The heating system is responsible for bringing water to the target temperature needed for proper cleaning and sanitizing. When the control board cannot confirm that the water has reached the expected temperature within the allotted time, or when it reads a temperature above the cutoff point, it triggers the HE code and halts the cycle to prevent damage or unsafe operation.

The two primary components involved in this fault are the thermistor and the heating element. The thermistor monitors water temperature and sends resistance-based signals to the control board. A failed or drifting thermistor can report incorrect temperatures, causing the board to believe heating has failed or that an overheat condition exists when neither may be true. The heating element itself can burn out, develop an open circuit, or lose continuity, preventing the water from warming at all. Both components should be tested with a multimeter to confirm whether resistance values fall within acceptable ranges.

Wiring integrity and inlet water temperature are also critical factors to rule out early in diagnosis. Loose, corroded, or broken connections at the thermistor, heater, or control board can interrupt the signal path and trigger a false HE fault. Additionally, if the incoming water supply temperature is extremely low, the heating element may not be able to compensate fast enough, leading the board to register a heating failure. Always verify the wiring harness connections and check the temperature of the hot water supply before replacing components.

Source: manufacturer service documentation.

Common causes of HE

  1. 01

    Failed thermistor

    Part replacement

    The thermistor measures water temperature and sends signals to the control board. If it has failed or drifted out of specification, it will report incorrect temperature readings and trigger the HE code even if the heater itself is functioning.

  2. 02

    Defective heating element

    Part replacement

    The heating element can burn out or develop an open circuit, preventing it from warming the water at all. Check continuity across the element with a multimeter; a lack of continuity confirms it needs replacement.

  3. 03

    Loose or damaged wiring connections

    Wiring / connection

    Corroded, loose, or broken wires at the thermistor, heater terminals, or control board can interrupt the signal and cause a false HE fault. Inspect the wiring harness carefully before condemning any component.

  4. 04

    Low inlet water temperature

    Wiring / connection

    If the hot water supply entering the dishwasher is too cold, the heating element may not be able to reach the target temperature within the allowed cycle time, causing the control board to log a heater error.

  5. 05

    Overheating condition above 194°F

    Part replacement

    A stuck or malfunctioning heating element that runs continuously, combined with a thermistor that fails to report the correct temperature, can drive water above 194°F and trigger the HE code as an overheat protection response.

See the test procedure for each cause

Frequently asked questions about HE

What does HE mean on a Kenmore dishwasher?
The HE code on a Kenmore dishwasher signals a heater error. It means the control board detected that the water either failed to reach the required temperature during the wash or rinse cycle, or that the water temperature exceeded the safe limit of 194°F. The dishwasher stops the cycle automatically when this code appears to prevent damage or unsafe conditions.
Can I fix the HE error on my Kenmore dishwasher myself?
Some causes of the HE error are DIY-friendly, such as checking and reseating wiring connections or confirming that the hot water supply is reaching the dishwasher at an adequate temperature. Testing and replacing the thermistor or heating element requires a multimeter and basic appliance repair skills. If you are not comfortable working with electrical components inside the appliance, a qualified technician should handle the repair.
Is it safe to use my Kenmore dishwasher when it shows the HE error?
You should not continue running the dishwasher while the HE error is active. The code can indicate either a failure to heat water, which means dishes will not be properly cleaned or sanitized, or an overheating condition above 194°F, which poses a more serious risk. Stop using the appliance until the fault is diagnosed and resolved.
How much does it cost to repair the HE error on a Kenmore dishwasher?
Repair costs depend on which component has failed. A replacement thermistor typically runs in the range of $15 to $40 for the part, while a new heating element generally costs between $20 and $60. If you hire a technician, labor charges will add to the total, often bringing the full repair cost to somewhere between $100 and $250 depending on your location and the parts needed.
Will resetting my Kenmore dishwasher clear the HE error code?
A reset may temporarily clear the HE code, but if the underlying problem with the thermistor, heating element, or wiring has not been fixed, the error will return as soon as the dishwasher attempts another cycle. Resetting is a useful first step to confirm whether the fault is intermittent or persistent, but it is not a substitute for diagnosing and repairing the root cause.

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