Frigidaire Range Error Code F105

F105 indicates a wake-up communication failure between the OUI (Oven User Interface) and the GPU (General Processing Unit). When the range powers on, these two control boards must establish communication with each other. If the OUI cannot reach the GPU during that startup sequence, the range displays F105 and stops normal operation.

An F105 fault means the two main control boards failed to communicate at startup, which typically prevents the range from operating normally. You should not attempt to use the oven or cooktop while this fault is active. Resolve the error before returning the appliance to regular use.

If the fix is simply a power reset or reseating a connector, there is no parts cost involved. Replacing a faulty GPU or OUI control board typically runs anywhere from $150 to $400 or more depending on the specific board, parts availability, and whether you hire a technician for the repair. Getting a diagnosis from a qualified technician can help confirm which component needs replacement before purchasing parts.

Cycling the power for 30 seconds is the first recommended step and can clear F105 if it was triggered by a transient power fault or corrupted startup state. Disconnect the range from its power source, wait 30 seconds, then restore power. If the code returns immediately, a hardware issue with the wiring or control boards is likely the cause and further diagnosis is needed.

Start by unplugging the range or shutting off its circuit breaker for 30 seconds to reset the control system. If the error persists, inspect the wiring harness and ribbon cable connections between the OUI and GPU boards for loose, corroded, or damaged connectors. If connections are intact and the fault continues, one of the control boards, either the GPU or the OUI, may need to be tested and replaced.