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Error code reference

Frigidaire Cooktop Error Code E51

Left Front element temperature sensor break.

Frigidaire codesFrigidaire cooktop codes

Left Front element temperature sensor break.

First step from the service manual

Verify element temperature sensor is correctly connected to the generator circuit board.

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

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  • 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
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What E51 means on a Frigidaire cooktop

The E51 error code on a Frigidaire cooktop indicates a break or open circuit condition in the temperature sensor associated with the left front heating element. This sensor is a critical safety and control component that continuously monitors the surface temperature of the element during operation. When the cooktop's control system detects that the sensor circuit is open rather than reporting a valid resistance reading, it triggers E51 and typically disables the affected element to prevent uncontrolled heating.

The temperature sensor on induction and radiant cooktops communicates with the generator circuit board by transmitting resistance values that correspond to specific temperatures. A break in this sensor or its wiring means the board receives no valid signal, which the system interprets as a fault condition. The most common points of failure are the sensor itself, the wiring harness connecting the sensor to the generator board, or a loose or corroded connector at the board's input terminal.

Diagnostic work begins at the connection point between the sensor harness and the generator circuit board. A disconnected, partially seated, or damaged connector can mimic a full sensor break and should be ruled out before replacing components. If the connection is secure, the sensor's resistance should be measured and compared against the expected value for ambient temperature. A sensor with infinite resistance or an open reading across its terminals confirms a break in the sensor element itself and requires replacement.

Source: manufacturer service documentation.

Common causes of E51

  1. 01

    Loose or disconnected sensor connector at the generator board

    Wiring / connection

    The sensor harness connector may have come loose from its socket on the generator circuit board, interrupting the signal. Inspecting and firmly reseating the connector is the first step before any parts replacement.

  2. 02

    Failed left front element temperature sensor

    Part replacement

    The sensor itself may have developed an internal open circuit, which will show as infinite resistance when measured with a multimeter across the sensor terminals. A confirmed open reading means the sensor must be replaced.

  3. 03

    Damaged or broken sensor wiring harness

    Part replacement

    The wiring between the sensor and the generator board can suffer breaks or chafing from heat exposure or physical damage during prior service. Visually inspect the harness for burned insulation, pinched wires, or visible breaks.

  4. 04

    Corroded or damaged connector terminals

    Wiring / connection

    Corrosion or bent pins at the sensor connector or the generator board socket can create an intermittent or complete open circuit. Inspect both the harness connector and board socket for oxidation or deformed terminals.

  5. 05

    Faulty generator circuit board

    Part replacement

    If the sensor and all wiring test correctly, the generator circuit board's sensor input circuit may have failed. This is the least common cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about E51

What does E51 mean on a Frigidaire cooktop?
E51 indicates a break detected in the temperature sensor circuit for the left front heating element. The cooktop's control system monitors the sensor continuously, and when it receives no valid signal from that sensor, it logs E51 and disables the affected element. This is a protective measure to prevent uncontrolled heating caused by a missing temperature reference.
Can I fix the E51 error myself?
Some causes of E51 can be addressed without professional help, particularly if the fault is simply a loose connector at the generator circuit board. Reseating the sensor harness connector is a straightforward check. However, replacing the temperature sensor or generator circuit board involves disassembling the cooktop and working near electrical components, which is best handled by someone comfortable with appliance repair.
Is it safe to keep using my cooktop while E51 is active?
The cooktop disables the left front element when E51 is active, so that specific zone will not operate. While other elements may still function, continued use of the appliance with an active fault is not recommended. The underlying sensor failure means the cooktop cannot properly regulate temperature on that element, creating a safety risk if the fault condition changes.
How much does it cost to repair an E51 error on a Frigidaire cooktop?
Repair costs vary depending on the failed component. A replacement temperature sensor typically ranges from $20 to $60 in parts. A generator circuit board is more expensive, often ranging from $80 to $200 or more depending on the model. Adding professional labor, total repair costs can range from $100 to $350 or higher.
Will resetting the cooktop clear the E51 error?
Resetting the cooktop by cutting power at the breaker may temporarily clear the E51 code, but the error will return as soon as the control system re-checks the sensor circuit and detects the break. A reset does not repair the underlying fault. Permanent resolution requires identifying and correcting the cause, whether that is a loose connection, a failed sensor, or damaged wiring.

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