Frigidaire Cooktop Error Code E55

The E55 error code on a Frigidaire cooktop indicates a break or open circuit condition in the temperature sensor associated with the right front heating element. This sensor is a thermistor or thermocouple-type component that continuously monitors the surface or element temperature and reports that data back to the generator circuit board. When the control system detects that the signal from this sensor has been interrupted or falls outside the expected resistance range, it logs E55 and typically disables the affected element as a safety precaution.

The generator circuit board is the central control component that powers the induction or radiant element and processes sensor feedback to regulate cooking temperatures. A "break" in the sensor circuit means the board is receiving no signal at all, which differs from a resistance drift or out-of-range reading. This type of fault most commonly originates at the physical connection between the sensor wiring harness and the board, at the sensor itself, or at some point along the wiring between the two components.

Diagnosing this code should begin by confirming that the temperature sensor connector is fully seated and undamaged at the generator circuit board port. If the connection is secure and the wiring shows no visible damage, the sensor itself should be tested for continuity. A broken sensor will show an open circuit reading on a multimeter. If both the sensor and wiring check out, the generator circuit board may be failing to read a valid signal, pointing to a board-level fault.