KitchenAid Microwave Error Code F3-E3

F3-E3 means the control board has detected a short in the meat probe circuit. The board reads a resistance value from the probe or its wiring that is far below the expected range, so it flags the fault and stops the cooking program. The most common source is a failed probe, but the probe jack or wiring harness can also cause this code.

In most cases the microwave will not complete a probe-controlled cook cycle while F3-E3 is active. Standard microwave functions may still operate if you disconnect the meat probe and clear the error, but continuing to use the appliance with a known fault in the probe circuit is not advisable until the root cause is identified. A shorted harness inside the oven is a potential safety concern and should be inspected before further use.

Power cycling the microwave may temporarily clear the display, but F3-E3 will return as soon as the control board reads the probe circuit again if the underlying fault is still present. Removing the meat probe before powering the unit back on can help determine whether the probe itself is causing the short. A permanent fix requires resolving the faulty component, whether that is the probe, the jack, or the wiring harness.

Start by disconnecting the meat probe and measuring its resistance with a multimeter. A good probe reads approximately 78k ohms at 60°F or 37k ohms at 90°F. If resistance is out of range, replace the probe. If the probe tests correctly, check that it seats firmly in the probe jack inside the oven cavity, then inspect the wiring harness connection at the back of the oven for damage or loose terminals. Harness work inside the rear of the unit requires disassembly and should be handled by a technician if you are not comfortable working around high-voltage components.

A replacement KitchenAid meat probe typically costs $20-$50 for the part, and replacing it yourself requires no disassembly. If the probe jack or wiring harness is the problem, parts range from $15-$60, but labor from an appliance technician adds $75-$150 or more depending on your area. Diagnosing the fault yourself with a multimeter before calling a technician can save the cost of a diagnostic service call.