mypros+
Error code reference

Thermador Cooktop Error Code ErXY

The touch control has an internal failure.

Thermador codesThermador cooktop codes

The touch control has an internal failure.

MyPros+ Max

Get the full diagnostic procedure for ErXY.

  • 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
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What ErXY means on a Thermador cooktop

The ErXY error code on a Thermador cooktop indicates an internal failure within the touch control module. This module is the electronic assembly responsible for interpreting capacitive or resistive touch inputs from the cooktop surface and translating them into operational commands for the burner control circuitry. When the control detects an internal fault it cannot self-correct, it generates ErXY and typically disables cooktop operation as a safety precaution.

Internal failures of the touch control module can stem from several sources. Corrupted firmware or a logic processor fault within the control board can cause the module to report an unrecoverable error state. Physical damage to the board, such as cracked solder joints, failed capacitors, or a shorted trace, can similarly trigger this code. Moisture or grease intrusion into the control assembly is another known contributor, as conductive contamination between circuit paths disrupts normal signal processing.

Because the failure is identified as internal to the touch control itself rather than an external sensor or wiring fault, diagnosis typically centers on the control module as the primary suspect. Inspecting the ribbon cable connections between the touch surface and the control board is a reasonable early step, since a loose or damaged ribbon cable can mimic an internal board fault. If connections are secure and the error persists after a full power cycle, replacement of the touch control module is generally the indicated repair.

Source: manufacturer service documentation.

Common causes of ErXY

  1. 01

    Touch control module internal board failure

    Part replacement

    The logic processor or internal circuitry of the touch control board has failed, causing an unrecoverable fault state. This is the most direct cause the code points to and typically requires board replacement.

  2. 02

    Corrupted control firmware

    Wiring / connection

    A firmware error or memory corruption within the touch control module can cause it to report an internal failure code. A full power reset may temporarily clear this, but recurrence usually indicates a hardware fault.

  3. 03

    Loose or damaged ribbon cable connection

    Wiring / connection

    The ribbon cable connecting the touch surface to the control board can become loose, frayed, or damaged, causing the board to register an internal communication failure. Inspect the cable seating and condition carefully before condemning the board.

  4. 04

    Moisture or grease contamination on the control board

    Part replacement

    Liquid or grease intrusion into the control assembly can create conductive paths between circuit traces, disrupting normal operation and triggering internal fault codes. Look for visible residue, corrosion, or discoloration on the board surface.

  5. 05

    Failed capacitors or cracked solder joints on the control board

    Part replacement

    Physical component failures such as bulging capacitors or cracked solder joints caused by heat cycling over time can produce intermittent or permanent internal faults. These are typically identified through close visual inspection of the board.

See the test procedure for each cause

Frequently asked questions about ErXY

What does ErXY mean on a Thermador cooktop?
ErXY indicates that the touch control module has detected an internal failure it cannot resolve on its own. The cooktop displays this code and may disable operation to prevent unsafe use. The fault is located within the touch control assembly itself rather than in an external component like a temperature sensor or relay.
Can I fix the ErXY error myself, or do I need a technician?
A power cycle, performed by cutting power to the cooktop at the breaker for several minutes, is a reasonable first step and may clear a temporary firmware glitch. If the error returns after restoring power, the repair typically involves accessing the control module to inspect ribbon cable connections and the board itself, which requires disassembly and a level of comfort with electronics. Most homeowners will benefit from having a qualified technician handle this repair.
Is it safe to keep using my Thermador cooktop when ErXY is displayed?
You should not attempt to use the cooktop while the ErXY error is active. The touch control module has reported an internal failure, which means the control circuitry may not reliably interpret commands or regulate burner operation. Continuing to use the appliance in this condition poses a potential safety risk.
How much does it cost to repair the ErXY error on a Thermador cooktop?
Repair costs vary depending on whether the touch control module needs replacement or if the issue is a simpler connection problem. Touch control board replacements for premium cooktops like Thermador typically range from $200 to $600 or more including parts and labor. A service diagnostic visit alone generally costs between $75 and $150 before any parts are factored in.
Will resetting my Thermador cooktop clear the ErXY error code?
A reset by cutting power at the circuit breaker for several minutes can clear the error if the cause was a temporary firmware or processor glitch. However, if the underlying cause is a hardware failure such as a damaged board, failed component, or contaminated circuit, the error will return after power is restored. A reset that does not hold is a strong indicator that the touch control module requires physical inspection or replacement.

Related Thermador cooktop codes

All Thermador cooktop codes
View all 129 Thermador cooktop codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass