Electrolux Oven Error Code F25

The F25 error code on an Electrolux oven indicates that the control system is not detecting a zero cross signal from the convection fan and oven lights control board. The zero cross signal is a reference point used by the main control board to synchronize switching operations with the AC power cycle, occurring 120 times per second on a 60 Hz supply. Without this signal, the control board cannot properly time relay switching for the convection fans and oven lights, so it flags F25 and may disable those components to prevent damage or erratic operation.

This error specifically involves the upper or lower oven convection fan and oven lights control board, which receives its power through connector P2. Pin 3 of P2 carries the neutral leg and pin 5 carries the L1 hot leg. If either of these connections is absent, loose, or open, the board cannot generate or transmit the zero cross signal back to the main control. A wiring fault between the power supply and the board is the first thing to investigate before assuming the board itself has failed.

If the power connections at P2 are confirmed good with correct voltage present at both pins and the error persists, the convection fan and oven lights control board is likely faulty internally. The board contains the circuitry responsible for generating the zero cross reference signal, and an internal component failure within that board will produce the same F25 fault regardless of the wiring condition. In that case, replacement of the affected upper or lower board is required to resolve the error.