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Error code reference

Dacor Oven Error Code C02

Touch panel cancel redundancy failure

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Touch panel cancel redundancy failure - one of the cancel key input lines has opened or shorted.

First step from the service manual

Cycle power for reset. Replace glass/touchpad assembly. Verify version compatibility and replace logic board if needed.

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

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What C02 means on a Dacor oven

The C02 error code on a Dacor oven indicates a touch panel cancel redundancy failure. Specifically, one of the cancel key input lines within the touchpad assembly has either opened (lost continuity) or shorted (created an unintended electrical connection). The cancel key on Dacor ovens is typically monitored through redundant input circuits, meaning the control system watches more than one signal line to confirm a valid key press or release. When these lines disagree or one falls outside expected parameters, the control board registers the discrepancy as a fault and triggers C02.

The two primary components involved in this fault are the glass touchpad assembly and the logic board. The touchpad assembly contains the membrane-style input circuits, including the dedicated cancel key traces. If a trace within the membrane is physically damaged, contaminated with moisture, or has degraded over time, it can produce an open or short condition on one of the redundant cancel input lines. The logic board interprets these signals and flags the mismatch.

Version compatibility between the touchpad assembly and the logic board is a critical factor during diagnosis and repair. Installing a replacement touchpad that does not match the firmware version on the logic board can perpetuate the fault or introduce new ones. If the C02 code persists after replacing the touchpad assembly, the logic board itself should be evaluated, as internal input circuit failures on the board can produce the same symptom. A power cycle should always be the first step before any component replacement to rule out a transient control error.

Source: manufacturer service documentation.

Common causes of C02

  1. 01

    Failed or damaged touchpad membrane

    Part replacement

    The flexible circuit traces inside the touchpad assembly, particularly the cancel key input lines, can open or short due to wear, heat exposure, or physical damage. This is the most common source of C02 and is typically resolved by replacing the glass and touchpad assembly.

  2. 02

    Moisture or contamination in the touchpad

    Part replacement

    Liquid intrusion or cooking residue beneath the touchpad glass can bridge or corrode the cancel key input circuits, causing a short or intermittent open condition. Inspect the touchpad surface and surrounding area for signs of moisture or staining.

  3. 03

    Transient control board error

    Wiring / connection

    Occasional voltage fluctuations or power interruptions can cause the logic board to misread the cancel key input lines and trigger C02 without any physical component failure. Cycling power to the oven is the first recommended step, as this can clear a false fault.

  4. 04

    Touchpad and logic board version incompatibility

    Part replacement

    If a replacement touchpad has been installed that does not match the firmware version of the existing logic board, the cancel key redundancy signals may not be interpreted correctly, producing C02. Confirm part compatibility before completing any touchpad replacement.

  5. 05

    Faulty logic board input circuit

    Part replacement

    If the cancel key input circuit on the logic board itself has failed, the board will report a redundancy fault even when the touchpad assembly is functioning correctly. This should be considered after a verified-compatible replacement touchpad still does not resolve the error.

See the test procedure for each cause

Frequently asked questions about C02

What does C02 mean on a Dacor oven?
C02 on a Dacor oven indicates a touch panel cancel redundancy failure. The oven monitors the cancel key through multiple input lines, and one of those lines has either opened or shorted. This fault points to a problem with the touchpad assembly or, less commonly, the logic board. A power cycle is the first recommended step before replacing any parts.
Will resetting the oven clear the C02 error code?
Cycling power to the oven can clear C02 if the fault was caused by a transient electrical issue rather than a physical component failure. Turn the oven off at the circuit breaker, wait at least 60 seconds, and restore power. If the code returns, a hardware issue with the touchpad assembly or logic board is the likely cause and will require further diagnosis.
Is it safe to use my Dacor oven while it shows a C02 error?
A C02 fault indicates the oven's control system has detected an issue with cancel key input redundancy, which affects how reliably you can cancel or stop a cooking cycle. Until the fault is resolved, the oven may not respond predictably to cancel commands. It is best to avoid unattended use until the touchpad or logic board has been inspected and the fault is cleared.
How do I fix a C02 error on a Dacor oven?
Start by cycling power at the circuit breaker for at least 60 seconds to rule out a transient fault. If the code returns, the glass and touchpad assembly is the most likely component to replace, as the cancel key input traces are located there. Confirm that any replacement touchpad is version-compatible with your logic board. If replacing the touchpad does not resolve the error, the logic board should also be evaluated and replaced if necessary.
How much does it cost to repair a Dacor oven showing C02?
Repair costs vary depending on which component needs replacement. A replacement touchpad assembly for a Dacor oven typically runs in the range of $100 to $300 for the part alone. If the logic board is also required, parts costs can range from $200 to $500 or more. Adding professional labor will increase the total, and the exact cost depends on your model and local service rates.

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