F4E6 names the microwave wave guide temperature sensor or its wiring. The reset takes a minute; a repeat needs service.
Model compatibility: KitchenAid reuses codes across series and model years, so F4E6 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Possible problem with the Microwave Wave Guide Temperature Sensor or its wiring.
What the code covers
This is a microwave-side code on a KitchenAid wall oven. For F4E6 the manufacturer names the microwave wave guide temperature sensor and the wiring attached to it.
A wave guide, briefly
Generally, a wave guide is the metal passage microwave energy travels through on its way to the cooking compartment. With a temperature sensor mounted on it, the control can tell how warm that passage is. KitchenAid names the sensor and gives no temperature limit.
Reset
Cut power to the oven at its circuit breaker for one minute.
Restore power.
Look at the display for a minute and see whether F4E6 returns.
Check that the oven runs.
What happens after
Code gone and oven working: KitchenAid’s article has nothing more for you to do.
Code back: service is the next move, because no other step is offered.
Opening the microwave section is not described by KitchenAid, and it gives no way to reach or test the sensor, so leave that to a technician.
Will F4E6 tell me how hot the wave guide got? It will not. The sensor and wiring are named, with no temperature value.
Codes in the same area
F4E3: the other microwave temperature sensor, for exhaust air
If F4E6 stays on your KitchenAid, phone (310) 363-8964 for Los Angeles service. It helps to say that it is the wave guide sensor code and that the breaker was already reset.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your KitchenAid appliance?
Book a specialist visit for a clear estimate and approval before any repair.
