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Error code reference

Frigidaire Cooktop Error Code E24

Lock key sensor defective.

Frigidaire codesFrigidaire cooktop codes

Lock key sensor defective.

First step from the service manual

Test cables and connections on main power/right front cook zone touch control.

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

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What E24 means on a Frigidaire cooktop

The E24 error code on a Frigidaire cooktop indicates that the lock key sensor has been detected as defective. The lock key is part of the touch control interface, typically integrated into the main control panel for the right front cook zone. This sensor is responsible for detecting when the control lock function is activated or deactivated, preventing unintended operation of the cooktop. When the cooktop's internal diagnostics determine that this sensor is not responding correctly or is producing an out-of-range signal, it triggers the E24 fault.

The right front cook zone touch control assembly contains capacitive or resistive sensor elements that communicate with the main control board. A defective lock key sensor can result from physical damage to the touch surface, moisture or contamination beneath the glass or control panel, a broken or intermittent wiring connection between the touch panel and the main board, or a failed control board that misreads sensor input. Because the first diagnostic step targets cables and connections on the main power and right front cook zone touch control, wiring integrity should always be evaluated before assuming the sensor or board itself has failed.

Diagnostic work should begin by inspecting the ribbon cables and harness connectors linking the touch control panel to the main board. Look for loose pins, corrosion, burn marks, or damaged insulation. If all connections are secure and undamaged, the touch control panel or main control board may need to be replaced. Operating the cooktop with an active E24 code may disable lock functionality or cause the cooktop to remain in a locked or non-responsive state.

Source: manufacturer service documentation.

Common causes of E24

  1. 01

    Loose or damaged wiring connection

    Wiring / connection

    A disconnected, corroded, or damaged cable between the touch control panel and the main board is the most common trigger for E24. Inspect all ribbon cables and harness connectors at both ends for loose pins or visible damage.

  2. 02

    Moisture or contamination under the touch panel

    Wiring / connection

    Spills or cleaning fluid that seeps beneath the cooktop surface can interfere with capacitive sensor readings, causing the lock key sensor to report a fault. Allow the panel to dry completely and clean the surface before further testing.

  3. 03

    Failed touch control panel

    Part replacement

    The touch control assembly for the right front cook zone may have a failed sensor element that cannot be repaired. If wiring checks out and the error persists, the touch panel itself is likely defective and will need replacement.

  4. 04

    Defective main control board

    Part replacement

    If the touch panel and all wiring connections test as acceptable, the main control board may be misreading or failing to process the lock key sensor signal. A faulty board will continue to generate E24 regardless of panel condition.

  5. 05

    Physical damage to the control surface

    Part replacement

    Cracks, chips, or impact damage to the glass or panel surface directly above the lock key sensor can permanently disrupt sensor function. Visually inspect the control area for any signs of physical damage.

See the test procedure for each cause

Frequently asked questions about E24

What does E24 mean on a Frigidaire cooktop?
E24 on a Frigidaire cooktop means the lock key sensor has been detected as defective. This sensor is part of the right front cook zone touch control and is responsible for enabling and disabling the control lock function. The cooktop's internal diagnostics flagged the sensor as non-functional or out of range. The problem may be in the wiring, the touch panel itself, or the main control board.
Can I fix the E24 error myself on my Frigidaire cooktop?
Some E24 errors can be resolved without replacing parts if the cause is a loose cable or contamination under the touch panel. Start by disconnecting power to the cooktop, then inspect the ribbon cables and harness connectors on the main power and right front cook zone touch control for any loose or corroded connections. If the error returns after reconnecting and restoring power, the touch control panel or main board likely needs professional replacement.
Is it safe to use my Frigidaire cooktop while E24 is displayed?
Using the cooktop with an active E24 error is not recommended. A defective lock key sensor may cause the control lock function to behave unpredictably, leaving the cooktop either permanently locked or unable to engage the lock. This could create a safety hazard, particularly in households with children. Resolve the fault before returning the appliance to regular use.
Will resetting my Frigidaire cooktop clear the E24 error?
A power reset by turning off the breaker or unplugging the cooktop for several minutes may temporarily clear the E24 code, but it will return if the underlying cause has not been addressed. If the lock key sensor or its wiring is genuinely defective, the fault will reappear once the cooktop runs its diagnostics again. A reset is useful for confirming whether the issue is intermittent or persistent.
How much does it cost to repair an E24 error on a Frigidaire cooktop?
Repair costs vary depending on which component has failed. If only a wiring connection needs to be reseated, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing the touch control panel generally costs between $100 and $300 for the part, plus labor. A main control board replacement can range from $150 to $400 or more for the part, depending on the specific cooktop model.

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