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Error code reference

Kenmore Dishwasher Error Code 7-2

Heater stuck on

Kenmore codesKenmore dishwasher codes

Heater stuck on — faulty heater drive circuit on the control.

First step from the service manual

Unplug dishwasher or disconnect power and replace control. Inspect heater and connections for overheating/shorting.

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

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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 7-2 means on a Kenmore dishwasher

Error code 7-2 on a Kenmore dishwasher indicates the control board has detected a heater stuck-on condition, meaning the heater drive circuit on the control is not properly shutting off the heating element. The control monitors heater operation throughout the wash and dry cycles, and when it cannot interrupt power to the heater as expected, it throws this fault and halts operation. The fault originates in the control board's heater relay or drive circuit, not necessarily in the heating element itself, though the element and its wiring can contribute.

For homeowners, this means the electronic control that runs your dishwasher detected that the heating element was receiving power when it should have been turned off. This can happen because a relay on the control board has failed in the closed position, or because a short in the heater wiring is sending a false signal back to the control. Either way, the dishwasher stops the cycle as a safety measure to prevent overheating.

Because the fault points primarily to the heater drive circuit on the control board, replacing the control is the primary repair. However, a shorted heating element or damaged wiring harness connection can stress or damage that circuit, so inspecting the heater and its connections for signs of heat damage or shorting is a necessary part of any complete repair.

Source: manufacturer service documentation.

Common causes of 7-2

  1. 01

    Failed heater relay on control board

    Part replacement

    The relay responsible for switching the heater circuit on the control board can fail in the closed position, keeping the heating element energized continuously. When this happens, the control detects it cannot interrupt heater power and triggers the 7-2 fault.

  2. 02

    Shorted heating element

    Part replacement

    A heating element that has developed an internal short can create a current path that mimics a stuck-on condition, feeding back into the heater drive circuit on the control. This can also damage the control board relay over time if left unaddressed.

  3. 03

    Damaged or shorted heater wiring harness

    Part replacement

    Wiring connections between the heating element and the control board can melt, fray, or short against the tub or chassis, especially after an overheating event. A shorted harness can trigger the 7-2 code and may also cause burn marks or discoloration near the connection points.

  4. 04

    Overheated heater circuit connections

    Wiring / connection

    Connector terminals at the heating element or control board end of the harness can overheat, pit, and develop high resistance or intermittent shorts. Inspecting these terminals for discoloration, melting, or corrosion is part of diagnosing this fault before condemning the control board.

See the test procedure for each cause

Frequently asked questions about 7-2

What does error code 7-2 mean on a Kenmore dishwasher?
Error code 7-2 means the control board detected that the heater drive circuit is stuck in the on position, meaning it cannot shut off power to the heating element as commanded. The fault is diagnosed as a problem within the control board's heater drive circuit. The dishwasher stops the cycle to prevent overheating damage.
Is it safe to use my Kenmore dishwasher when error code 7-2 is showing?
No, you should not continue using the dishwasher while this code is active. A stuck-on heater condition means the heating element may be receiving uncontrolled power, which poses a risk of overheating the tub, damaging internal components, or in a worst case, creating a fire hazard. Keep the dishwasher unplugged until the control board and heater circuit have been inspected and repaired.
How do I fix error code 7-2 on a Kenmore dishwasher?
Start by unplugging the dishwasher or disconnecting power at the breaker. The primary repair is replacing the control board, since the 7-2 fault points to the heater drive circuit on that board. Before installing a new control, inspect the heating element and its wiring harness connections for signs of shorting, melted insulation, or burnt terminals. If the element or wiring is damaged, replace those components first, otherwise the fault can recur and damage the new control.
How much does it cost to fix a Kenmore dishwasher 7-2 error?
A replacement control board for a Kenmore dishwasher typically costs between $80 and $200 depending on the model, and the part is available from appliance parts suppliers using your model number. If you are doing the repair yourself, the board is usually accessible after removing the inner door panel, and the job takes most people 30 to 60 minutes. If a technician does the repair, expect to add $100 to $150 in labor. If the heating element also needs replacement, add another $20 to $60 for that part.
Can a bad heating element cause the 7-2 code on a Kenmore dishwasher?
Yes, a shorted heating element can trigger or contribute to the 7-2 code by creating an unintended current path through the heater drive circuit on the control board. Before replacing only the control board, test the heating element for continuity and check for shorts to ground using a multimeter. If the element reads shorted, replace it along with the control board, since running a shorted element can damage the new board's relay as well.

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