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Error code reference

GE Range Error Code 746

Redundant ADC mismatch wing board knob 6

GE codesGE range codes

Redundant ADC mismatch wing board knob 6 — primary and redundant ADC values differ by more than 100 counts for 15 seconds.

First step from the service manual

Check knob board; fault sets if mismatch persists 15 seconds.

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

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What 746 means on a GE range

Error code 746 on a GE range indicates a redundant ADC (analog-to-digital converter) mismatch on the wing board for knob 6. The control system uses two independent ADC channels to read the position of knob 6 simultaneously, a design intended to catch failures in the control circuitry. When the two readings diverge by more than 100 counts and that discrepancy persists for 15 consecutive seconds, the control triggers fault code 746. This dual-channel verification is a safety feature that ensures burner output commands are based on accurate knob position data.

The wing board is a secondary control board that interfaces the physical knob assemblies with the main control board. Knob 6 specifically connects through this board, and its position is translated into a voltage signal that both ADC channels measure. If the wing board develops a fault, either through component degradation, a loose ribbon cable connection, or damage to the PCB traces, one ADC channel can begin reporting values inconsistent with the other. The 100-count threshold and 15-second window are built in to prevent nuisance faults from brief electrical noise.

Common root causes include a failing or damaged wing board, poor contact at the knob potentiometer, wiring harness issues between the knob and the board, or corrosion on connector pins. In some cases the knob itself, if it uses an integrated potentiometer, can develop an intermittent resistance fault that causes one ADC channel to drift. Because the fault specifically targets knob 6, diagnostics should begin at that specific knob assembly and its associated connections on the wing board before suspecting the main control board.

Source: manufacturer service documentation.

Common causes of 746

  1. 01

    Faulty wing board

    Part replacement

    The wing board that processes signals from knob 6 can develop internal component failures that cause its two ADC channels to report mismatched values. Inspect the wing board for signs of burn marks, cracked solder joints, or physical damage.

  2. 02

    Loose or corroded connector between knob and wing board

    Wiring / connection

    A poor connection at the ribbon cable or wiring harness between knob 6 and the wing board can introduce resistance or intermittent signal loss that throws off one ADC channel. Check all connectors for corrosion, bent pins, or incomplete seating.

  3. 03

    Worn or failing knob potentiometer

    Part replacement

    If knob 6 uses an integrated potentiometer to report its rotational position, wear or internal damage to that component can produce an unstable or inconsistent voltage signal. Resistance readings at the potentiometer terminals that fall outside the expected range indicate a failing component.

  4. 04

    Damaged wiring harness

    Part replacement

    Chafed, pinched, or heat-damaged wiring between the knob assembly and the wing board can cause signal degradation that affects one ADC channel more than the other. Visually inspect the harness routing for any contact with hot surfaces or sharp edges.

  5. 05

    Main control board fault

    Part replacement

    In less common cases, the main control board that receives and interprets signals from the wing board may have an internal fault causing it to misread one of the ADC channels. This is generally diagnosed only after the wing board and all connections have been confirmed good.

See the test procedure for each cause

Frequently asked questions about 746

What does 746 mean on a GE range?
Error code 746 means the range detected a mismatch between two independent ADC readings for knob 6 on the wing board. The two readings diverged by more than 100 counts for at least 15 seconds, triggering the fault. This is a safety feature designed to flag unreliable knob position data before it can affect burner operation. The most likely causes are a faulty wing board, a bad connection, or a worn knob potentiometer.
Can I fix error code 746 on my GE range myself?
A knowledgeable DIYer can start by checking the wiring harness and connector at knob 6 and the wing board for loose or corroded connections, which requires no parts and may resolve the fault. If connections are secure, replacing the wing board is the next step and is a manageable repair with basic hand tools. However, if the main control board is involved, the complexity and cost of that repair may warrant calling a technician.
Is it safe to use my GE range while error code 746 is active?
Code 746 indicates that the control system cannot reliably read the position of knob 6, which means burner control through that knob may be unpredictable or non-functional. It is not recommended to rely on that burner for cooking until the fault is resolved. If other burners remain unaffected and function normally, those may be usable, but the range should be serviced promptly.
Will resetting my GE range clear error code 746?
A power reset by unplugging the range or cycling the breaker may temporarily clear the code, but it will return if the underlying fault is still present. The fault requires that the ADC mismatch persist for 15 seconds, so the code will reappear quickly once the range returns to normal operation with the defective component still in place. A reset is useful for confirming whether the fault is intermittent, but it is not a fix.
How much does it cost to repair error code 746 on a GE range?
If the fix is limited to reseating a connector or cleaning corroded pins, there may be little to no parts cost, though a technician visit can run anywhere from 75 to 150 dollars for diagnosis alone. Replacing the wing board typically costs between 80 and 200 dollars for the part, plus labor if a technician does the work. A main control board replacement is more expensive, generally ranging from 200 to 400 dollars or more for parts and labor combined.

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