Electrolux Oven Error Code FU12

FU12 indicates an Upper Inverter Overvoltage AC fault. The oven's control system detected that the incoming AC power supply voltage exceeded 300Vac, which triggered an automatic shutdown to protect internal components. The fault points primarily to the external power supply rather than a failed oven part.

No, you should not attempt to use the oven while this fault is active. The oven shuts down automatically when FU12 is triggered because operating with overvoltage conditions can damage internal electronics and pose a safety risk. Do not continue using the appliance until the power supply has been confirmed to be stable and within normal voltage range.

If the problem is with your home's electrical supply or wiring, electrician service calls typically range from $100 to $300 or more depending on the scope of work. If the fault requires an inverter board replacement inside the oven, parts and labor combined can range from $200 to $600 or higher. Getting a professional diagnosis first will help narrow down whether the fix is an electrical supply correction or an internal component repair.

The first step is checking your home's electrical supply voltage using a multimeter at the outlet or junction box where the oven connects. If you find an electrical wiring issue, a loose neutral, or a faulty breaker, a licensed electrician should perform that repair. If the power supply checks out and the fault persists, a technician will need to evaluate the oven's inverter board.

A reset may temporarily clear the fault code, but the error will return if the underlying power supply issue has not been resolved. Simply unplugging the oven and plugging it back in does not fix the root cause. The incoming AC voltage must be measured and confirmed within safe limits before the oven will operate reliably.