Electrolux Oven Error Code ECEu

ECEu indicates a failure in the top cavity thermocouple, identified internally as TCAV UP. This sensor monitors the temperature in the upper oven cavity and sends a signal to the Appliance Control Unit. When that signal is lost or falls outside acceptable parameters, the oven stops the active cycle and displays ECEu. The fault can originate from the thermocouple itself, the wiring connector at ACU port X18, or the control board.

The oven stops the cooking cycle when ECEu appears precisely because it cannot reliably monitor upper cavity temperature. Operating the oven without accurate temperature sensing creates a risk of overheating, so continued use until the fault is resolved is not recommended. The only exception noted is steam cycles running at 100 degrees Celsius, which may continue under specific conditions.

Repair cost depends on which component is at fault. A thermocouple sensor replacement is generally the least expensive part of the repair, typically in the range of $20 to $80 for the part, plus labor if a technician is involved. If the ACU is the cause, control board replacements can range from $150 to $400 or more for parts alone. Diagnostic labor fees from a service technician commonly add $75 to $150 on top of parts costs.

A knowledgeable DIYer can start by inspecting connector X18 on the ACU for visible corrosion or loose pins, since a poor connection is often the cause. If the connector looks good, replacing the top cavity thermocouple is a straightforward repair for someone comfortable working on appliances. However, if the error persists after those steps, diagnosing or replacing the ACU typically requires a qualified technician.

Powering the oven off and back on may temporarily clear the display, but the ECEu code will return if the underlying fault still exists. The thermocouple signal is monitored continuously during operation, so any persistent wiring, sensor, or ACU issue will trigger the error again. A reset alone is not a fix and should not be relied upon as a solution.