Frigidaire Cooktop Error Code E51

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.

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.

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.

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.

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.