KitchenAid Range Error Code F1-E4

F1-E4 means the control board detected a shorted Q8, which is an internal transistor on the board's own circuitry. This is a board-level fault, not a sensor or wiring issue. The control board is the primary suspect and will typically need to be replaced to resolve the code.

You should not continue using the range with F1-E4 active. A shorted Q8 on the control board means internal circuitry has failed in a way that could affect how power is routed to heating elements or other components. Continued use risks further board damage or unpredictable behavior from affected outputs.

A power reset will occasionally clear a false fault, but F1-E4 caused by a genuinely shorted Q8 will return after power is restored. Disconnect the range from power for 5 minutes, then reconnect and observe whether the code comes back. If it reappears, the control board has a confirmed failure and needs to be replaced.

Start by disconnecting power to the range for 5 minutes and restoring it to see if the code clears. If F1-E4 returns, the electronic control board needs to be replaced. Locate the part number on your existing board or use your model number to order the correct replacement. Board replacement is within reach for a confident DIYer comfortable working with appliance electronics, but if you are uncertain about working with wiring, a technician is advisable.

A replacement KitchenAid range control board typically costs between $150 and $350 depending on the model. If you hire a technician, expect to add $100 to $200 in labor for the diagnostic visit and board replacement. DIY replacement is possible since the board is usually accessible from the back panel or behind the control console, and no special tools are required beyond basic screwdrivers.