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Error code reference

GE Dishwasher Error Code Start

Communications Failure

GE codesGE dishwasher codes

Communications Failure - User Interface control is unable to communicate with the machine control.

First step from the service manual

Check wiring between UI control and main control board; check main board service LED for communication errors.

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

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What Start means on a GE dishwasher

The Start error on a GE dishwasher indicates a communications failure between the User Interface (UI) control board and the main machine control board. These two boards work in tandem: the UI board processes your button inputs and displays cycle status, while the main control board manages the actual wash components including the pump motor, water inlet valve, and heating element. When communication between them breaks down, the dishwasher cannot execute commands and triggers this fault condition.

The communication link between the UI and main control typically runs through a wiring harness that carries serial data signals between the boards. Any disruption along this path, including loose connectors, damaged wiring, corroded terminals, or a failed board, will prevent the two controllers from exchanging the handshake signals they require to operate. The main control board includes a service LED that flashes diagnostic codes, and checking this LED is a key early step in isolating whether the fault originates on the communication bus itself or within one of the boards.

The most common root causes are physical: connectors that have worked loose from vibration over time, or wire insulation that has worn through from contact with moving components. In some cases, moisture intrusion into a connector can cause intermittent or complete communication loss. A failed UI board or main control board is also possible, though board-level failures are typically ruled out only after wiring integrity has been confirmed.

Source: manufacturer service documentation.

Common causes of Start

  1. 01

    Loose or disconnected wiring harness connector

    Wiring / connection

    The ribbon cable or harness connector linking the UI board to the main control board can work loose over time due to dishwasher vibration. Inspect both ends of the harness for connectors that are not fully seated.

  2. 02

    Damaged or pinched wiring between boards

    Part replacement

    Wire insulation can wear through if a harness is routed near a moving part or a sharp edge, causing a short or an open circuit in the communication line. Visually trace the full harness path and look for any visible damage.

  3. 03

    Corroded or burned connector terminals

    Wiring / connection

    Moisture inside the dishwasher can reach connector pins and cause oxidation or corrosion, increasing resistance on the communication circuit enough to drop the signal. Check the terminals at both boards for discoloration, pitting, or residue.

  4. 04

    Failed User Interface control board

    Part replacement

    If the wiring harness checks out and the main board service LED indicates no fault on its end, the UI board itself may have failed internally and is no longer transmitting or receiving data signals.

  5. 05

    Failed main control board

    Part replacement

    The main control board can fail in a way that prevents it from completing the communication handshake with the UI, even if the UI board is functional. The service LED on the main board can help confirm whether the board is processing signals at all.

See the test procedure for each cause

Frequently asked questions about Start

What does Start mean on a GE dishwasher?
The Start error on a GE dishwasher signals a communications failure between the User Interface control board and the main machine control board. When these two boards cannot exchange data, the dishwasher cannot process commands or run cycles. The fault is typically caused by a wiring issue between the two boards, though a failed board is also possible. Checking the wiring harness and the main board service LED are the recommended first diagnostic steps.
Can I fix the Start communications error on my GE dishwasher myself?
A knowledgeable DIYer can attempt to diagnose and fix this error by inspecting the wiring harness between the UI control and the main control board for loose connectors, visible damage, or corroded terminals. Reseating connectors firmly is a straightforward fix that requires no parts. However, if the boards themselves need to be replaced, the repair requires some comfort with appliance disassembly and working around electrical components.
Will resetting my GE dishwasher clear the Start error?
A reset, typically performed by cutting power to the dishwasher at the circuit breaker for a minute or two, may temporarily clear the error if the communication failure was caused by a one-time software glitch. However, if the underlying cause is a physical wiring fault or a damaged board, the error will return once the dishwasher attempts to communicate again. A reset is a reasonable first step, but a recurring error requires hands-on diagnosis.
Is it safe to use my GE dishwasher while the Start communications error is active?
No, the dishwasher will not run a cycle while this error is active because the control boards cannot communicate well enough to coordinate operation. Attempting to use the appliance in this state is not productive, and running it with damaged wiring near water-handling components is not advisable. The fault should be diagnosed and resolved before returning the unit to regular use.
How much does it cost to repair the Start communications error on a GE dishwasher?
Repair costs vary depending on the root cause. If the fix is simply reseating a loose connector, a service call fee of roughly 75 to 150 dollars may be the only expense. Replacing a wiring harness typically adds 30 to 80 dollars in parts. A new UI board or main control board can range from 100 to 300 dollars or more in parts alone, plus labor, making board replacements the more costly outcome.

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